2025/03/27 更新

写真a

マスヤ リュウタ
桝屋 隆太
Masuya Ryuta
所属
附属病院 講師
職名
講師
連絡先
メールアドレス
外部リンク

学位

  • 博士(医学) ( 2019年3月   鹿児島大学 )

研究キーワード

  • 胆道閉鎖症

  • 小児外科

  • 先天性胆道拡張症

  • 新生児外科

  • 低侵襲手術

研究分野

  • ライフサイエンス / 外科学一般、小児外科学

学歴

  • 鹿児島大学   大学院医歯学総合研究科

    2015年4月 - 2019年3月

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    国名: 日本国

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  • 鹿児島大学   医学部   医学科

    1998年4月 - 2004年3月

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    国名: 日本国

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経歴

  • 愛媛大学   消化管・腫瘍外科学講座   講師

    2024年4月 - 現在

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    備考:小児外科

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  • 宮崎大学医学部附属病院   消化管・内分泌・小児外科   助教

    2019年4月 - 2024年3月

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  • 鹿児島大学病院   小児外科   特任助教

    2016年10月 - 2019年3月

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  • 鹿児島市立病院   新生児科   医長

    2015年4月 - 2016年3月

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  • 北九州市立八幡病院   外科   部長

    2012年10月 - 2015年3月

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  • 鹿児島大学病院   小児外科   特任助教

    2011年4月 - 2012年9月

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  • 鹿児島市立病院   小児外科   医員

    2010年4月 - 2011年3月

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  • 東京都立清瀬小児病院(東京都立小児総合医療センター)   外科   サブスペシャリティレジデント

    2008年4月 - 2010年3月

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  • 国立研究開発法人国立成育医療研究センター   病理学分野   レジデント

    2016年4月 - 2016年9月

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  • 倉敷第一病院   外科   医員

    2007年4月 - 2008年3月

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  • 鹿児島大学病院   小児外科   医員

    2006年4月 - 2007年3月

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  • 川内市医師会立市民病院   臨床研修医

    2005年12月 - 2006年3月

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  • 鹿児島医師会病院   臨床研修医

    2005年11月

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  • 鹿児島こども病院   臨床研修医

    2005年10月

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  • 鹿児島県立姶良病院   臨床研修医

    2005年9月

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  • 薩摩川内市下甑手打診療所   臨床研修医

    2005年8月

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  • 肝属郡医師会立病院   臨床研修医

    2004年12月 - 2005年7月

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  • 鹿児島大学病院   臨床研修医

    2004年5月 - 2004年11月

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所属学協会

  • 日本周産期・新生児医学会

    2015年4月 - 現在

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  • 日本内視鏡外科学会

    2013年4月 - 現在

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  • 日本小児血液・がん学会

    2011年4月 - 現在

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  • 日本小児外科学会

    2004年4月 - 現在

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  • 日本小児救急医学会

    2013年4月 - 現在

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  • 日本外科代謝栄養学会

    2012年4月 - 現在

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  • 日本外科学会

    2004年9月 - 現在

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取得資格

  • 小児外科指導医

  • 日本周産期・新生児医学会認定外科医

  • 小児外科専門医

  • 外科専門医

  • 医師免許

論文

  • Circulating maternal chimeric cells have an impact on the outcome of biliary atresia. 査読 国際誌

    Ryuta Masuya, Toshihiro Muraji, Sami B Kanaan, Toshio Harumatsu, Mitsuru Muto, Miki Toma, Toshihiro Yanai, Anne M Stevens, J Lee Nelson, Kazuhiko Nakame, Atsushi Nanashima, Satoshi Ieiri

    Frontiers in pediatrics   10   1007927 - 1007927   2022年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

    INTRODUCTION: We aimed to quantify the DNA of maternal chimeric (MC) cells in the peripheral blood of the BA patients and investigated the impact on the outcome. METHODS: Patients with progressive jaundice because of no bile flow, which necessitated liver transplantation, or who showed inadequate bile flow with or without episodes of cholangitis and progressive hepatic fibrosis and portal hypertension were classified into the poor group. Those with adequate bile flow with completely normal liver function tests beyond 2 years were classified into the good group. The qPCR were separately carried out in buffy coat samples and plasma samples, targeting the non-inherited maternal HLA alleles in the DNA samples. RESULTS: MC-DNA was present in the buffy coat (10-328 gEq per 106 host cells) in seven patients. There was no MC-DNA in the remaining five patients. MC-DNA (214-15,331 gEq per 106 host cells) was observed in the plasma of five patients. The quantity of MC-DNA in the buffy coat showed a significant difference between the two prognostic groups (p = 0.018), whereas there was no significant difference in the quantity of MC-DNA in plasma (p = 0.205). MC-DNA in the buffy coat was significantly associated with the outcome (p = 0.028), whereas MC-DNA in the plasma did not influence the outcome (p = 0.56). CONCLUSIONS: Poor outcomes in BA were correlated with circulating maternal chimeric lymphocytes.

    DOI: 10.3389/fped.2022.1007927

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  • Morphometric demonstration of portal vein stenosis and hepatic arterial medial hypertrophy in patients with biliary atresia. 査読 国際誌

    Ryuta Masuya, Toshihiro Muraji, Haruo Ohtani, Motoi Mukai, Shun Onishi, Toshio Harumatsu, Koji Yamada, Waka Yamada, Takafumi Kawano, Seiro Machigashira, Kazuhiko Nakame, Tatsuru Kaji, Satoshi Ieiri

    Pediatric surgery international   35 ( 5 )   529 - 537   2019年5月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

    PURPOSE: Portal hypertension in patients with biliary atresia (BA) is generally thought to result from portal vein (PV) narrowing secondary to hepatic fibrosis. To test the hypothesis, we morphometrically analyzed the PVs and hepatic arteries (HAs). METHODS: Morphometrical analyses of 25 BA and 26 non-BA liver biopsy specimens from patients treated from 2000 to 2014. The total specimen area, the fibrotic portal area, vessel diameter and medial thickness of the HAs were measured. RESULTS: The PV diameter in BA patients was significantly smaller than that in non-BA patients. In BA, the numbers of normal-sized PVs and capillaries were decreased and increased, respectively. The PV diameter was not significantly correlated with the degree of fibrosis. We newly found that medial hypertrophy and the HA diameter increased with the number of endothelial cells in BA. The PV diameter was not significantly correlated with the medial thickness and was positively correlated with the HA diameter in BA. CONCLUSIONS: The narrowing of the PV is unlikely to occur secondarily to liver fibrosis. The medial hypertrophy of the HA is not correlated with the decrease in the PV blood flow. These findings seem to be unique to the primary vascular lesions of BA.

    DOI: 10.1007/s00383-019-04459-4

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  • 胆道閉鎖症葛西手術術後患者における自己肝生存率に対する予後因子の検討 査読

    桝屋 隆太, 連 利博, 中目 和彦, 川野 孝文, 春松 敏夫, 山田 和歌, 町頭 成郎, 向井 基, 加治 建, 家入 里志

    日本小児外科学会雑誌   54 ( 7 )   1324 - 1331   2018年12月

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    担当区分:筆頭著者   記述言語:日本語   出版者・発行元:(一社)日本小児外科学会  

    【目的】胆道閉鎖症(以下本症)の自己肝生存率に関連する予後因子を、自験例をもとに検討した。【方法】1984年4月1日より2017年3月31日まで当科で葛西手術を施行した本症84例を対象として患者背景、術前生化学検査所見、初回手術日齢、ステロイド初回投与量、漢方薬投与の有無について自己肝生存例(native liver survival群;NLS群)と死亡または肝移植例(非NLS群)で比較検討した。【結果】自己肝生存率は術後1年77.4%、術後10年62.7%、術後20年56.6%、術後25年46.9%となった。初回手術日齢はNLS群:60.4±16.0日、非NLS群:73.1±29.5日でNLS群が有意に早かった(p=0.0135)。術前ALT、γGTP値において各群に有意差はなかった。術前AST値(IU/l)はNLS群:180.1±113.8、非NLS群:257.2±231.4、T-bil値(mg/dl)はNLS群:9.16±3.65、非NLS群:12.77±5.45、D-bil値(mg/dl)はNLS群:6.27±2.00、非NLS群:8.77±4.15であり、NLS群においてAST(p=0.0489)、T-bil(p=0.000489)、D-bil(p=0.000484)が有意に低値であった。ステロイド初回投与量(mg/kg/day)はNLS群:3.49±1.21、非NLS群:2.49±1.73とNLS群で有意に多かった(p=0.00247)。【結論】今回の検討では自己肝生存に関連する因子として初回手術日齢、術前ASTおよびビリルビン値、ステロイド初回投与量が示唆された。(著者抄録)

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    その他リンク: https://search.jamas.or.jp/default/link?pub_year=2018&ichushi_jid=J01113&link_issn=&doc_id=20190110110003&doc_link_id=%2Fes5shoge%2F2018%2F005407%2F003%2F1324-1331%26dl%3D0&url=https%3A%2F%2Fwww.medicalonline.jp%2Fjamas.php%3FGoodsID%3D%2Fes5shoge%2F2018%2F005407%2F003%2F1324-1331%26dl%3D0&type=MedicalOnline&icon=https%3A%2F%2Fjk04.jamas.or.jp%2Ficon%2F00004_2.gif

  • A Retrospective Review of 28 Cases of Pediatric Malignant Renal Tumors at a Single Institution

    Takafumi Kawano, Koshiro Sugita, Ryuta Masuya, Nanako Nishida, Ayaka Nagano, Masakazu Murakami, Keisuke Yano, Shun Onishi, Toshio Harumatsu, Tatsuro Nakamura, Koji Yamada, Waka Yamada, Mitsuru Muto, Yuichi Kodama, Takuro Nishikawa, Tatsuru Kaji, Yasuhiro Okamoto, Satoshi Ieiri

    Diseases   2025年1月

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.3390/diseases13020040

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  • Enhanced lymphangiogenesis in the left lateral segment of a biopsied liver during portoenterostomy for biliary atresia. 国際誌

    Yudai Tsuruno, Koshiro Sugita, Toshihiro Muraji, Ryuta Masuya, Toshio Harumatsu, Keisuke Yano, Shun Onishi, Takafumi Kawano, Chihiro Ichikawa, Haruo Ohtani, Yuko Bitoh, Satoshi Ieiri

    Pediatric surgery international   40 ( 1 )   261 - 261   2024年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    PURPOSE: We investigate the histopathology of the portal vein branches and lymphatic vessels to elucidate the mechanism of atrophy of the left lateral segment (LLS) of the liver in biliary atresia (BA). METHODS: LLS and right anterior segment (RAS) liver biopsy samples obtained during Kasai portoenterostomy (KPE) from ten consecutive patients with BA underwent histopathological investigation of the portal vein and lymphatic vessels using double chromogenic immunostaining for CD31/D2-40 and the hepatitis-like findings (HLF) score. Each parameter and clinical data were compared between prognostic groups. RESULTS: HLF scores in the LLS were always higher than those in the RAS. There was no difference in portal vein and lymphatic vascular morphology, whereas the number of lymphatic vessels was correlated with the fibrotic area of all specimen areas. Left-to-right ratio of the number of lymphatic vessels was correlated with the age at KPE (r = 0.784, p = 0.007) and the pre-KPE CRP value (r = 0.723, p = 0.018). CONCLUSIONS: Lymphangiogenesis on the LLS compared to the RAS was significantly correlated with the degree of fibrosis and the age at KPE. Further investigation is warranted to clarify the causes of LLS atrophy and lymphangiogenesis relevant to immune dysregulation.

    DOI: 10.1007/s00383-024-05845-3

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  • A case of late-presenting congenital diaphragmatic hernia diagnosed at 5 years with acute abdomen. 査読 国際誌

    Ryuta Masuya, Kazuhiko Nakame, Shun Munakata, Shinsuke Takeno, Atsushi Nanashima, Satoshi Ieiri

    Surgical case reports   10 ( 1 )   177 - 177   2024年7月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

    BACKGROUND: Some congenital diaphragmatic hernias are diagnosed beyond 1 month. A late-presenting congenital diaphragmatic hernia shows a variety of clinical manifestations, and the preoperative clinical course is variable. We herein report a pediatric case of late-presenting congenital diaphragmatic hernia diagnosed as acute abdomen. CASE PRESENTATION: A 5-year-old boy was brought to our hospital because of herniation of the intestine into the left thoracic cavity, which was observed on radiography performed for abdominal pain. Enhanced computed tomography showed herniation of the small intestine and colon into the left thoracic cavity. Emergency laparoscopic surgery was performed based on the diagnosis of left diaphragmatic hernia. The entire small intestine and part of the colon herniated from the posterolateral defect of the diaphragm. We were able to retract the herniated intestine back into the abdomen but confirmed that the diaphragmatic defect and closure of the defect seemed to be technically challenging via laparoscopy; therefore, we converted the procedure to open laparotomy. The diaphragmatic defect was directly closed with interrupted sutures, and the thoracic cavity was degassed. Postoperatively, the left lung was found to be poorly expanded, but pulmonary hypoplasia was not evident in this case. CONCLUSIONS: We herein report a pediatric case of late-presenting congenital diaphragmatic hernia diagnosed as abdominal pain. Late-presenting congenital diaphragmatic hernias present with a wide variety of symptoms; therefore, it is important to be reminded of these conditions and check chest radiographs in children presenting with acute or chronic respiratory or gastrointestinal symptoms of unknown etiology.

    DOI: 10.1186/s40792-024-01980-0

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  • An ultrasound-guided supraclavicular approach for tunneled central venous catheter insertion can be safely performed by junior residents. 国際誌

    Yumiko Iwamoto, Shun Onishi, Koshiro Sugita, Kazuhiko Nakame, Tatsuru Kaji, Keisuke Yano, Masato Ogata, Lynne Takada, Chihiro Kedoin, Ayaka Nagano, Masakazu Murakami, Toshio Harumatsu, Koji Yamada, Waka Yamada, Ryuta Masuya, Takafumi Kawano, Mitsuru Muto, Satoshi Ieiri

    Pediatric surgery international   40 ( 1 )   207 - 207   2024年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    PURPOSE: Ultrasound-guided supraclavicular catheterization (UGSC) of the brachiocephalic vein (BCV) for long-term tunneled central venous catheter (tCVC) insertion may be safer than the internal jugular vein approach due to its superior field of view. We examined the clinical outcomes of tCVC insertions performed by junior residents through UGSC of the BCV. PATIENTS AND METHODS: From January 2018 to December 2023, we assessed clinical outcomes and compared the experience levels of surgeons conducting tCVC insertions. Surgeons were categorized into three groups: junior residency (JR), senior residency (SR), and board-certified pediatric surgeons (BCPS). RESULTS: 177 tCVC insertions were done on 146 patients. Intraoperative complications included 6 cases of arterial puncture, 1 case of pneumothorax, 1 case of over insertion of catheter tip, and 1 case of suspected hemothorax. Distribution across groups was as follows: 28 cases (15.8%) in JR group, 92 (52.0%) in SR group, and 57 (32.2%) in BCPS group. Although the JR group exhibited longer operation times than the BCPS group, no significant differences in intraoperative complications were noted. CONCLUSION: Junior residents can safely perform UGSC for tCVC insertion. However, careful consideration of complications such as arterial or thoracic puncture is essential and case selection should be based on experience.

    DOI: 10.1007/s00383-024-05773-2

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  • Inflammation patterns in early post-operative cholangitis predict long-term outcomes in biliary atresia: a potential role of non-suppurative cholangitis. 国際誌

    Toshio Harumatsu, Toshihiro Muraji, Ryuta Masuya, Yudai Tsuruno, Yumiko Iwamoto, Masato Ogata, Lynne Takada, Chihiro Kedoin, Ayaka Nagano, Masakazu Murakami, Koshiro Sugita, Keisuke Yano, Shun Onishi, Takafumi Kawano, Mitsuru Muto, Tatsuru Kaji, Satoshi Ieiri

    Pediatric surgery international   40 ( 1 )   190 - 190   2024年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    PURPOSE: Frequent post-operative cholangitis in biliary atresia (BA) affects the long-term native liver survival. This study assessed the characteristics of early cholangitis and their influence on the prognosis. METHODS: Forty-three patients with BA who underwent surgery between 2000 and 2020 were analyzed for routine inflammatory markers. Early cholangitis characteristics were compared between native liver survivor (NLS) and living donor liver transplant (LDLT) patients. RESULTS: Among the 43 patients, 30 (69.8%) experienced 130 episodes of cholangitis. In the area under the receiver operating characteristics curve (AUROC) analysis, the cutoff value of the total cholangitis episodes was 3, with an area under the AUROC curve of 0.695 (95% confidence interval 0.522-0.868). Before 3 years old, 113 episodes (86.9%) of cholangitis were observed. The white blood cell, C-reactive protein, and alanine aminotransferase values at cholangitis onset did not markedly differ between the LDLT and NLS groups. Conversely, the neutrophil-to-lymphocyte ratio in the NLS group was significantly lower than in the LDLT group (0.85 vs. 1.63, p < 0.001). CONCLUSIONS: Cholangitis in the NLS group was lymphocyte-dominant and atypical in its pathogenesis. Lymphocyte-dominant cholangitis is non-suppurative, and future research should clarify its pathogenesis to improve the treatment and prognosis of BA.

    DOI: 10.1007/s00383-024-05774-1

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  • 地方総合周産期医療センターにおける超・極低出生体重児に対する外科治療成績の検討

    中目 和彦, 桝屋 隆太, 東 真理絵, 横山 亮平, 落合 佳代, 青木 良則, 山田 直史, 山下 理絵, 金子 政時, 家入 里志, 七島 篤志, 児玉 由紀, 桂木 真司

    日本周産期・新生児医学会雑誌   60 ( Suppl.1 )   P346 - P346   2024年6月

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    記述言語:日本語   出版者・発行元:(一社)日本周産期・新生児医学会  

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  • 術前診断が困難であった右上葉の過分葉肺に生じた気管支閉鎖症の1例

    田畑 有弥子, 杉田 光士郎, 春松 敏夫, 岩元 祐実子, 緒方 将人, 高田 倫, 祁答院 千寛, 村上 雅一, 大西 峻, 桝屋 隆太, 川野 孝文, 武藤 充, 中目 和彦, 家入 里志

    日本小児外科学会雑誌   60 ( 4 )   730 - 730   2024年6月

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    記述言語:日本語   出版者・発行元:(一社)日本小児外科学会  

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  • 診断時に出血傾向を呈した胆道閉鎖症の臨床的検討

    桝屋 隆太, 連 利博, 春松 敏夫, 杉田 光士郎, 町頭 成郎, 大西 峻, 山田 耕嗣, 山田 和歌, 松久保 眞, 川野 孝文, 武藤 充, 中目 和彦, 加治 建, 七島 篤志, 家入 里志

    日本小児外科学会雑誌   60 ( 4 )   735 - 735   2024年6月

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    記述言語:日本語   出版者・発行元:(一社)日本小児外科学会  

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  • Clinical outcome and neurological development of patients with biliary atresia associated with a bleeding tendency: a single institution experience. 査読

    Ryuta Masuya, Toshihiro Muraji, Toshio Harumatsu, Seiro Machigashira, Yumiko Iwamoto, Masato Ogata, Lynne Takada, Nanako Nishida, Chihiro Kedoin, Ayaka Nagano, Mayu Matsui, Masakazu Murakami, Koshiro Sugita, Keisuke Yano, Shun Onishi, Koji Yamada, Waka Yamada, Makoto Matsukubo, Takafumi Kawano, Mitsuru Muto, Kazuhiko Nakame, Tatsuru Kaji, Atsushi Nanashima, Satoshi Ieiri

    Surgery today   54 ( 5 )   452 - 458   2024年5月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

    PURPOSE: We compared the clinical features of patients with biliary atresia (BA) associated with a bleeding tendency (BT) at the time of the diagnosis with those of patients without a bleeding tendency (NBT). METHODS: The patients' background characteristics, age in days at the first visit, Kasai portoenterostomy (KPE), and postoperative course were retrospectively analyzed. RESULTS: Nine of the 93 BA patients (9.7%) showed a BT, including 7 with intracranial hemorrhaging (ICH), 1 with gastrointestinal bleeding, and 1 with a prothrombin time (PT) of 0%. The age at the first visit was 62 ± 12 days old for BT patients and 53 ± 27 days old for NBT patients (p = 0.4); the age at KPE was 77 ± 9 days old for BT patients and 65 ± 24 days old for NBT patients (p = 0.2); the time from the first visit to surgery was 13 ± 7 days for BT patients and 11 ± 10 days for NBT patients (p = 0.5); and the native liver survival rate was 56% for BT patients and 58% for NBT patients (p = 1), with no significant difference in any of the parameters. The neurological outcomes of survivors of ICH were favorable. CONCLUSIONS: Appropriate BT correction allowed early KPE even after ICH, resulting in native liver survival rates comparable to those of NBT patients without significant neurological complications.

    DOI: 10.1007/s00595-023-02744-3

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  • Notable Clinical Differences Between Neonatal and Post-Neonatal Intestinal Malrotation: A Multicenter Review in Southern Japan. 国際誌

    Chihiro Kedoin, Mitsuru Muto, Ayaka Nagano, Mayu Matsui, Koshiro Sugita, Tokuro Baba, Kina Miyoshi, Ryuta Masuya, Masakazu Murakami, Keisuke Yano, Shun Onishi, Toshio Harumatsu, Waka Yamada, Koji Yamada, Makoto Matsukubo, Takafumi Kawano, Masaaki Kuda, Kazuhiko Nakame, Motofumi Torikai, Satoshi Ieiri

    Journal of pediatric surgery   59 ( 4 )   566 - 570   2024年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    BACKGROUND: Most cases of intestinal malrotation appear in neonates with bilious vomiting due to midgut volvulus, whereas in cases that develop beyond infancy, the initial symptoms vary. This study investigated the clinical features of these two populations and identified issues that should be considered in daily practice. METHODS: A retrospective chart review was conducted from January 1, 2010, to December 31, 2022. Data on patients with intestinal malrotation were collected in an anonymized fashion from five pediatric surgical hub facilities in the Southern Kyushu and Okinawa areas of Japan. RESULTS: Of the 80 subjects, 57 (71.3%) were neonates (Group N) and 23 (28.7%) were infants and schoolchildren (Group I). The frequencies of initial symptoms, such as abdominal distention (Group N: 19.3% vs. Group I: 13.0%), bilious vomiting (59.6% vs. 43.5%), and hematochezia (8.8% vs. 21.7%), were not skewed by the age of onset (p = 0.535, 0.087, and 0.141, respectively). Midgut volvulus was significantly more frequent in Group N (71.9% [41/57] vs. 34.8% [8/23]; p = 0.005), while the degree of torsion was greater in group I (median 360° [interquartile range: 180-360°] vs. 450° [360-540°]; p = 0.029). Although the bowel resection rate was equivalent (7.0% [4/57] vs. 4.3% [1/23]; p = 1.000), half of the patients in Group N presented with 180° torsion. The neonatal intestine has been highlighted as being more susceptible to ischemia than that in older children. CONCLUSIONS: The incidence of midgut volvulus is higher in neonates than in older children. Even relatively mild torsion can cause ischemic bowel changes during the neonatal period. LEVEL OF EVIDENCE: LEVEL III.

    DOI: 10.1016/j.jpedsurg.2023.11.020

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  • BA葛西手術時の肝生検検体の免疫組織学的左右差の解析 肝形態変化の説明は可能か?

    鶴野 雄大, 連 利博, 杉田 光士郎, 桝屋 隆太, 春松 敏夫, 矢野 圭輔, 大西 峻, 川野 孝文, 市川 千宙, 大谷 明夫, 尾藤 祐子, 家入 里志

    日本小児外科学会雑誌   60 ( 3 )   512 - 512   2024年4月

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    記述言語:日本語   出版者・発行元:(一社)日本小児外科学会  

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  • 小児血液・悪性固形腫瘍患者に対する鎖骨上アプローチを用いた腕頭静脈穿刺による中心静脈カテーテル挿入術の検討

    中目 和彦, 桝屋 隆太, 永澤 俊, 中川 緑, 山田 愛, 木下 真理子, 上村 幸代, 盛武 浩, 家入 里志, 七島 篤志

    日本小児外科学会雑誌   60 ( 2 )   158 - 165   2024年4月

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    記述言語:日本語   出版者・発行元:(一社)日本小児外科学会  

    【目的】中心静脈カテーテル(CVC)は小児血液・悪性固形腫瘍患者の治療において使用される.近年,安全なCVC挿入法としてin-plane法を用いた超音波(US)ガイド下鎖骨上アプローチによる腕頭静脈穿刺CVC挿入術が報告されている.【方法】小児血液・悪性固形腫瘍患者を対象にout-of-plane法を用いて内頸静脈にトンネル型CVCを挿入した群(IJV群)とin-plane法を用いて腕頭静脈に挿入した群(BCV群)について患者背景,手術成績,合併症を後方視的に比較検討した.【結果】34名の患者に対し,計40回(IJV群:n=15,BCV群:n=25)のトンネル型CVCが挿入された.患者背景,術前血液凝固検査値は両群間に有意差はなかった.手術時間中央値(IQR)はIJV群:30分(27~33),BCV群:25.8分(22~27)であり,BCV群で有意に手術時間が短縮された(p=0.0026).術中合併症はIJV群で1例(6.7%)認め,BCV群では認めなかった.CVC維持管理中の合併症はIJV群:10例(66.7%),BCV群:17例(68%)であり,両群間で有意差は認めなかった.カテーテル関連血流感染はIJV群:10例(66.7%),BCV群:12例(52%)に認め,有意差はみられなかった.CVC留置期間中央値(IQR)はIJV群:273日(172~363.5),BCV群:152日(101~280)であり有意差を認めなかった.【結論】リアルタイム超音波ガイド下鎖骨上アプローチによる腕頭静脈穿刺術は小児血液・悪性固形患者に対しても安全な手技と考えられた.(著者抄録)

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    その他リンク: https://search.jamas.or.jp/default/link?pub_year=2024&ichushi_jid=J01113&link_issn=&doc_id=20240510080003&doc_link_id=10.11164%2Fjjsps.60.2_158&url=https%3A%2F%2Fdoi.org%2F10.11164%2Fjjsps.60.2_158&type=J-STAGE&icon=https%3A%2F%2Fjk04.jamas.or.jp%2Ficon%2F00007_3.gif

  • 超・極低出生体重児における重症新生児壊死性腸炎の治療成績の検討

    中目 和彦, 桝屋 隆太, 家入 里志, 七島 篤志

    日本小児外科学会雑誌   60 ( 3 )   454 - 454   2024年4月

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    記述言語:日本語   出版者・発行元:(一社)日本小児外科学会  

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  • 新生児期/乳児期早期(3ヵ月以下)の固形腫瘍症例の臨床的特徴 南九州3施設での解析

    川野 孝文, 杉田 光士郎, 馬場 徳朗, 桝屋 隆太, 岩元 祐実子, 緒方 将人, 高田 倫, 祁答院 千寛, 村上 雅一, 大西 峻, 武藤 充, 久田 正昭, 中目 和彦, 家入 里志

    日本小児外科学会雑誌   60 ( 3 )   453 - 453   2024年4月

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    記述言語:日本語   出版者・発行元:(一社)日本小児外科学会  

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  • 重症心身障がい児・者へのトラクションテクニックを用いた先行胃瘻温存腹腔鏡下噴門形成術 多施設共同研究

    祁答院 千寛, 武藤 充, 村上 雅一, 桝屋 隆太, 福原 雅弘, 渋井 勇一, 西田 ななこ, 長野 綾香, 杉田 光士郎, 矢野 圭輔, 大西 峻, 春松 敏夫, 山田 耕嗣, 山田 和歌, 川野 孝文, 松久保 眞, 伊崎 智子, 中目 和彦, 加治 建, 廣瀬 龍一郎, 七島 篤志, 家入 里志

    日本小児外科学会雑誌   60 ( 1 )   90 - 90   2024年2月

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    記述言語:日本語   出版者・発行元:(一社)日本小児外科学会  

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  • An unusual presentation of a rare formation of the common hepatic duct and right hepatic artery in a case of pediatric congenital biliary dilatation. 査読

    Ryuta Masuya, Kazuhiko Nakame, Kengo Kai, Yuki Tsuchimochi, Takeomi Hamada, Naoya Imamura, Masahide Hiyoshi, Atsushi Nanashima, Satoshi Ieiri

    Asian journal of endoscopic surgery   17 ( 1 )   e13264   2024年1月

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    担当区分:筆頭著者   記述言語:英語  

    A 15-year-old girl with recurrent upper abdominal pain was diagnosed with congenital biliary dilatation. Abdominal enhanced computed tomography (CT) showed the anterior segmental branch of the right hepatic artery (RHA) running across the ventral aspect of the dilated common hepatic duct (CHD). Laparoscopic extrahepatic dilated biliary duct excision and Roux-en-Y hepaticojejunostomy were planned. Intraoperatively, the dilated CHD was observed to bifurcate into the ventral and dorsal ducts, between which the anterior segmental branch of the RHA crossed through the CHD. The CHD rejoined on the distal side as one duct. We transected the CHD just above the cystic duct. The patency of the ventral and dorsal sides of the bifurcated CHD was confirmed. Laparoscopic hepaticojejunostomy was performed at the distal side of the rejoined CHD, without sacrificing the anterior segmental branch of the RHA. There was no postoperative blood flow impairment in the right hepatic lobe or anastomotic stenosis.

    DOI: 10.1111/ases.13264

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  • Proctoring System of Pediatric Laparoscopic Surgery for Choledochal Cyst. 国際誌

    Masakazu Murakami, Koji Yamada, Shun Onishi, Toshio Harumatsu, Tokuro Baba, Masaaki Kuda, Kina Miyoshi, Yoshinori Koga, Ryuta Masuya, Takafumi Kawano, Mitsuru Muto, Makoto Hayashida, Kazuhiko Nakame, Shin Shinyama, Jun Kuwabara, Kyosuke Tatsuta, Yusuke Yanagi, Ryuichiro Hirose, Takeshi Shono, Misato Migita, Tatsuru Kaji, Mitsuhisa Takatsuki, Atsushi Nanashima, Hiroshi Matsufuji, Satoshi Ieiri

    Journal of laparoendoscopic & advanced surgical techniques. Part A   33 ( 11 )   1109 - 1113   2023年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Background: Endoscopic surgery also has been becoming widespread in the field of pediatric surgery. However, most disease treated by pediatric surgery in a single institution are small number of cases. Besides, the variety of operative procedures that need to be performed in this field is quite wide. For these reasons, pediatric surgeons have limited opportunities to perform endoscopic surgery. Therefore, it is difficult to introduce advanced endoscopic surgery at a single local hospital. To educate pediatric surgeons in local hospitals, for widespread advanced pediatric endoscopic surgery safely, and to eliminate the need for patient centralization, we have introduced a proctoring system. We compared the surgical results of our institution, a center hospital, with other local institutions, to investigate the feasibility of our proctoring system. Methods: The experienced pediatric surgeon of our institution visits local hospitals to provide onsite coaching and supervises pediatric surgeons on the learning curve. All patients who underwent laparoscopic cyst excision and hepaticojejunostomy for choledochal cysts, one of the advanced pediatric endoscopic surgeries was retrospectively reviewed. Results: Thirty-four cases were evaluated (14 cases in our institution, 20 cases in 9 other institutions). The procedures of all 34 cases were performed by surgeons with 0-2 cases of experience in the procedure. There were no open conversion cases. There was no significant difference in the operative date. There was 1 case (6.7%) of postoperative complications during hospitalization at our institution and 3 cases (14.3%) at other institutions (P = .47). Two cases of late complications (13.3%) occurred at our institution, whereas 6 cases (28.6%) occurred at other institutions (P = .28). Conclusion: With the proctoring system, the performance and completion of advanced pediatric endoscopic surgery at local institutions was feasible. This has important implications given the ever-growing demand for pediatric endoscopic surgery and the increasing need for competent pediatric endoscopic surgeons.

    DOI: 10.1089/lap.2023.0087

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  • 超・極低出生体重児に発症した重症新生児壊死性腸炎の治療成績の検討

    中目 和彦, 桝屋 隆太, 後藤 智子, 山田 直史, 青木 良則, 山下 理絵, 金子 政時, 児玉 由紀, 家入 里志, 桂木 真司

    日本周産期・新生児医学会雑誌   59 ( Suppl.1 )   P385 - P385   2023年6月

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    記述言語:日本語   出版者・発行元:(一社)日本周産期・新生児医学会  

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  • 新生児期にイレウスを呈して発症するIsolated Hypoganglionosis治療の課題点とは

    武藤 充, 長野 綾香, 杉田 光士郎, 矢野 圭輔, 大西 峻, 春松 敏夫, 桝屋 隆太, 松久保 眞, 川野 孝文, 町頭 成郎, 中目 和彦, 鳥飼 源史, 池江 隆正, 加治 建, 家入 里志

    日本周産期・新生児医学会雑誌   59 ( Suppl.1 )   P359 - P359   2023年6月

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    記述言語:日本語   出版者・発行元:(一社)日本周産期・新生児医学会  

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  • 新生児期に発症する腸回転異常症の臨床的特徴 乳児期以降発症例との比較検討から

    長野 綾香, 杉田 光士郎, 矢野 圭輔, 大西 峻, 春松 敏夫, 桝屋 隆太, 松久保 眞, 川野 孝文, 武藤 充, 町頭 成郎, 中目 和彦, 鳥飼 源史, 加治 建, 家入 里志

    日本周産期・新生児医学会雑誌   59 ( Suppl.1 )   P263 - P263   2023年6月

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    記述言語:日本語   出版者・発行元:(一社)日本周産期・新生児医学会  

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  • Feasibility of Laparoscopic Fundoplication Without Removing the Preceding Gastrostomy in Severely Neurologically Impaired Patients: A Multicenter Evaluation of the Traction Technique. 国際誌

    Mitsuru Muto, Masakazu Murakami, Ryuta Masuya, Masahiro Fukuhara, Yuichi Shibui, Nanako Nishida, Chihiro Kedoin, Ayaka Nagano, Koshiro Sugita, Keisuke Yano, Shun Onishi, Toshio Harumatsu, Koji Yamada, Waka Yamada, Takafumi Kawano, Makoto Matsukubo, Tomoko Izaki, Kazuhiko Nakame, Tatsuru Kaj, Ryuichiro Hirose, Atsushi Nanashima, Satoshi Ieiri

    Journal of laparoendoscopic & advanced surgical techniques. Part A   33 ( 5 )   518 - 521   2023年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Purpose: Severely neurologically impaired patients sometimes require anti-reflux surgery with preceding gastrostomy. We apply a traction technique for laparoscopic fundoplication (LF) without gastrostomy takedown (GTD) in such cases. We conducted a multicenter review to assess the feasibility of our approach. Materials and Methods: In brief, the traction technique involves left-lateral-traction of the stomach body, right-lateral-traction of the round ligament of the liver, and elevation of the left liver lobe to create a sufficient field for manipulating the forceps. Patients who underwent LF with Nissen's procedures in 2010-2022 were retrospectively reviewed. Data were analyzed by a one-way analysis of variance. Results: The operative approaches included the traction technique (n = 16; Group 1), GTD and reconstruction (n = 5; Group 2), and LF followed by gastrostomy (n = 92; Group 3). In comparison with Group 1, significant differences were only found in pneumoperitoneum time (Group 1 versus Group 2 versus Group 3: 174.4 minutes versus 250.4 minutes versus 179.5 minutes; P = .0179). Operating time (222.7 minutes versus 303.0 minutes versus 239.7 minutes; P = .0743), duration to full-strength enteral nutrition (10.4 days versus 17.2 days versus 11.0 days; P = .0806), and length of hospital stay (17.2 days versus 31.0 days versus 18.5 days; P = .3247) were equivalent. No re-fundoplication was required in Group 1. Conclusion: The traction technique secures the operative quality and outcome of LF without GTD.

    DOI: 10.1089/lap.2022.0576

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  • 先天性嚢胞性肺疾患に対する胸腔鏡下肺葉切除の有効性についての検討

    川野 孝文, 杉田 光士郎, 矢野 圭輔, 馬場 徳朗, 桝屋 隆太, 久田 正昭, 中目 和彦, 新山 新, 鳥飼 源史, 家入 里志

    日本小児外科学会雑誌   59 ( 3 )   473 - 473   2023年5月

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    記述言語:日本語   出版者・発行元:(一社)日本小児外科学会  

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  • 超・極低出生体重児に対する外科治療成績の検討

    中目 和彦, 桝屋 隆太, 松久保 眞, 町頭 成郎, 鳥飼 源史, 向井 基, 七島 篤志, 家入 里志

    日本小児外科学会雑誌   59 ( 3 )   471 - 471   2023年5月

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    記述言語:日本語   出版者・発行元:(一社)日本小児外科学会  

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  • 半固形剤への変更により合併症の改善が得られた重心児の2例

    矢野 圭輔, 加治 建, 村上 雅一, 馬場 徳朗, 春松 敏夫, 大西 峻, 山田 和歌, 山田 耕嗣, 桝屋 隆太, 町頭 成郎, 中目 和彦, 向井 基, 家入 里志

    日本小児外科学会雑誌   59 ( 2 )   237 - 237   2023年4月

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    記述言語:日本語   出版者・発行元:(一社)日本小児外科学会  

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  • カフ付き長期留置型中心静脈カテーテル挿入術の工夫 超音波ガイド下鎖骨上アプローチによる腕頭静脈cannulation

    中目 和彦, 永井 太一朗, 矢野 圭輔, 春松 敏夫, 大西 峻, 山田 耕嗣, 山田 和歌, 桝屋 隆太, 加治 建, 七島 篤志, 家入 里志

    日本小児外科学会雑誌   59 ( 2 )   238 - 239   2023年4月

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    記述言語:日本語   出版者・発行元:(一社)日本小児外科学会  

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  • Association between gastrointestinal perforation and patent ductus arteriosus in extremely-low-birth-weight infants: a retrospective study of our decade-long experience. 国際誌

    Mitsuru Muto, Koshiro Sugita, Masakazu Murakami, Shinichiro Ikoma, Masato Kawano, Ryuta Masuya, Makoto Matsukubo, Takafumi Kawano, Seiro Machigashira, Kazuhiko Nakame, Motofumi Torikai, Takamasa Ikee, Hiroyuki Noguchi, Satoshi Ibara, Satoshi Ieiri

    Pediatric surgery international   39 ( 1 )   125 - 125   2023年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    PURPOSE: Management of persistently patent ductus arteriosus (PDA) in extremely low-birth-weight infants (ELBWIs) requires attention due to the risk of tissue hypoperfusion. We investigated the association between PDA and gastrointestinal perforation. METHODS: We performed a retrospective chart review from 2012 to 2021. Preterm (≤ 32 weeks) ELBWIs with PDA after birth who developed necrotizing enterocolitis (NEC), focal intestinal perforation (FIP), and idiopathic gastric perforation were included; ELBWIs with congenital heart disease were excluded. Data were analyzed using chi-squared tests with Yates; correction, and Student's t test. RESULTS: Five hundred thirty-five preterm ELBWIs were analyzed, including 20 with NEC, 22 with FIP, and 1 with gastric perforation. In NEC and FIP, the ductus arteriosus remained open in 40% (4/10) and 63.6% (14/22) of cases, respectively, and cyclo-oxygenase inhibitor treatment showed poor efficacy (p = 0.492 and 0.240). The incidence of perforation in NEC (4/9 vs. 6/11, p = 0.653), mortality in NEC (3/4 vs. 3/6, p = 0.895) and FIP (6/14 vs. 3/8, p = 0.838) did not differ according to whether the PDA persisted or resolved. CONCLUSION: The presentation of PDA did not affect the mortality or morbidity of ELBWIs. However, it is essential to consider the possibility of gastrointestinal perforation due to decreased organ blood flow caused by ductal steal.

    DOI: 10.1007/s00383-023-05420-2

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  • 胆道閉鎖症術後患児における末梢血中の母親由来キメラ細胞検出と予後との相関の検討

    桝屋 隆太, 連 利博, Kanaan Sami B., 春松 敏夫, 武藤 充, 東間 未来, 矢内 俊裕, Stevens Anne M., Nelson J. Lee, 中目 和彦, 七島 篤志, 家入 里志

    日本小児外科学会雑誌   59 ( 1 )   141 - 142   2023年2月

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    記述言語:日本語   出版者・発行元:(一社)日本小児外科学会  

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  • 葛西手術から9ヵ月後に挙上空腸脚の穿孔に伴う胆汁性腹膜炎を来した胆道閉鎖症術後の1例

    桝屋 隆太, 連 利博, 春松 敏夫, 山田 耕嗣, 杉田 光士郎, 中目 和彦, 家入 里志

    日本小児外科学会雑誌   59 ( 1 )   146 - 146   2023年2月

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    記述言語:日本語   出版者・発行元:(一社)日本小児外科学会  

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  • A case of a galactocele that presented as a mammary mass in a boy. 査読 国際誌

    Ryuta Masuya, Yohei Tominaga, Kazuhiko Nakame, Atsushi Nanashima, Satoshi Ieiri

    Pediatrics international : official journal of the Japan Pediatric Society   65 ( 1 )   e15705   2023年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1111/ped.15705

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  • Feasibility of delayed anastomosis for long gap esophageal atresia in the neonatal period using internal traction and indocyanine green-guided near-infrared fluorescence.

    Shun Onishi, Mitsuru Muto, Koji Yamada, Masakazu Murakami, Chihiro Kedoin, Ayaka Nagano, Mayu Matsui, Koshiro Sugita, Keisuke Yano, Toshio Harumatsu, Waka Yamada, Ryuta Masuya, Takafumi Kawano, Satoshi Ieiri

    Asian journal of endoscopic surgery   15 ( 4 )   877 - 881   2022年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    INTRODUCTION: Management of neonates with long gap esophageal atresia (LGEA) is one of the most challenging situations facing pediatric surgeons. Delayed anastomosis after internal traction for esophageal lengthening was reported as a useful technique for long gap cases. Additionally, the use of near-infrared (NIR) fluorescence imaging with indocyanine green (ICG) has gained popularity in pediatric surgery, especially for blood perfusion validation. We report a novel technique for safe and secure anastomosis for LGEA in the neonatal period using internal traction and ICG-guided NIR fluorescence. PATIENT AND SURGICAL TECHNIQUE: A pregnant woman with polyhydramnios was admitted to the department of obstetrics in our hospital. At 29 weeks of gestation, ultrasound showed mild polyhydramnios and absence of the fetal stomach. A male neonate was born at 38 weeks of gestation with 21 trisomy. EA (Gross type A) was diagnosed based on an X-ray study that showed the absence of gastric bubble with a nasogastric tube showing the "coil-up" sign. Thoracoscopic internal traction and laparoscopic gastrostomy were performed on day 4 after birth. We confirmed the distance between the upper pouch and lower pouch on X-ray. On day 16 after birth, thoracoscopic anastomosis was performed. We successfully performed esophageal anastomosis without tearing the esophageal wall. Blood perfusion of the upper and lower pouch was validated after anastomosis using ICG-guided NIR fluorescence. CONCLUSION: Delayed anastomosis for LGEA in the neonatal period using internal traction and ICG-guided NIR fluorescence is safe and feasible.

    DOI: 10.1111/ases.13098

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  • Using indocyanine green fluorescence in laparoscopic surgery to identify and preserve rare branching of the right hepatic artery in pediatric congenital biliary dilatation. 査読

    Ryuta Masuya, Makoto Matsukubo, Kazuhiko Nakame, Kengo Kai, Takeomi Hamada, Koichi Yano, Naoya Imamura, Masahide Hiyoshi, Atsushi Nanashima, Satoshi Ieiri

    Surgery today   52 ( 10 )   1510 - 1513   2022年10月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

    We describe a laparoscopic surgical technique using indocyanine green (ICG) fluorescence to identify and preserve rare arterial branching associated with pediatric congenital biliary dilatation. Congenital biliary dilatation with pancreaticobiliary maljunction was diagnosed in a 9-year-old girl, who presented with upper abdominal pain. Abdominal enhanced computed tomography (CT) showed that the accessory right hepatic artery (aRHA) branched from the posterior superior pancreaticoduodenal artery (PSPDA) and flowed through the right aspect of the dilated common bile duct (CBD) directly into the right lobe of the liver. We performed laparoscopic dilated biliary duct resection and hepaticojejunostomy, administering ICG intravenously, at a dose of 0.6 mg/kg. The ICG fluorescence overlay mode showed an aRHA running along the right side of the dilated CBD. The aRHA was dissected from the CBD without injury. After finishing the anastomosis, the beating of the aRHA was preserved, confirming that blood flow had been maintained.

    DOI: 10.1007/s00595-022-02516-5

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  • Is anemia frequently recognized in gastroschisis compared to omphalocele? A multicenter retrospective study in southern Japan. 国際誌

    Koshiro Sugita, Mitsuru Muto, Kiyotetsu Oshiro, Masaaki Kuda, Tsukasa Kinjyo, Ryuta Masuya, Seiro Machigashira, Takafumi Kawano, Kazuhiko Nakame, Motofumi Torikai, Satoshi Ibara, Tatsuru Kaji, Satoshi Ieiri

    Pediatric surgery international   38 ( 9 )   1249 - 1256   2022年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    PURPOSE: We compared cases of anemia in gastroschisis versus omphalocele and investigated this clinical question. METHODS: A multicenter study of five pediatric surgery departments in southern Japan was planned. Sixty patients were collected between 2011 and 2020, with 33 (gastroschisis: n = 19, omphalocele: n = 14) who met the selection criteria ultimately being enrolled. Anemia was evaluated before discharge and at the first outpatient visit. RESULTS: Despite gastroschisis cases showed more frequent iron administration during hospitalization than omphalocele (p = 0.015), gastroschisis cases tended to show lower hemoglobin values at the first outpatient visit than omphalocele cases (gastroschisis: 9.9 g/dL, omphalocele: 11.2 g/dL). Gastroschisis and the gestational age at birth were significant independent predictors of anemia at the first outpatient visit, (gastroschisis: adjusted odds ratio [OR] 19.00, p = 0.036; gestational age at birth: adjusted OR 0.341, p = 0.028). A subgroup analysis for gastroschisis showed that the ratio of anemia in the 35-36 weeks group (8/10, 80.0%) and the > 37 weeks group (6/6, 100%) was more than in the < 34 weeks group (0/3, 0.0%). CONCLUSIONS: Gastroschisis may carry an increased risk of developing anemia compared with omphalocele due to the difference of direct intestinal exposure of amnion fluid in utero.

    DOI: 10.1007/s00383-022-05150-x

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  • A retrospective analysis of the real-time ultrasound-guided supraclavicular approach for the insertion of a tunneled central venous catheter in pediatric patients. 国際誌

    Kazuhiko Nakame, Tatsuru Kaji, Shun Onishi, Masakazu Murakami, Ayaka Nagano, Mayu Matsui, Taichiro Nagai, Keisuke Yano, Toshio Harumatsu, Koji Yamada, Waka Yamada, Ryuta Masuya, Mitsuru Muto, Satoshi Ieiri

    The journal of vascular access   23 ( 5 )   698 - 705   2022年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    PURPOSE: Tunneled central venous catheter (tCVC) placement plays an important role in the management of pediatric patients. We adopted a real-time ultrasound (US)-guided supraclavicular approach to brachiocephalic vein cannulation. We evaluated the outcomes of tCVC placement via a US-guided supraclavicular approach. METHODS: A retrospective study was performed for patients who underwent US-guided central venous catheterization of the internal jugular vein (IJV group) and brachiocephalic vein (BCV group) in our institution. The background information and outcomes were reviewed using medical records. RESULTS: We evaluated 85 tCVC placements (IJV group: n = 59, BCV group: n = 26). Postoperative complications were recognized in 19 patients in the IJV group (catheter-related bloodstream infection (CRBSI), n = 14 (1.53 per 1000 catheter days); occlusion, n = 1 (1.7%, 1.09 per 1000 catheter days); accidental removal, n = 3 (5.2%, 0.33 per 1000 catheter days); and other, n = 1 (1.7%, 1.09 per 1000 catheter days)) and five patients in the BCV group (CRBSI, n = 2 (0.33 per 1000 catheter days); catheter damage, n = 1 (3.8%, 1.67 per 1000 catheter days); and accidental removal, n = 2 (7.7%, 0.33 per 1000 catheter days)). In the BCV group, despite that, the incidence of postoperative complications was lower (p = 0.205) and the period of placement was significantly longer in comparison to the IJV group (p = 0.024). CONCLUSION: US-guided placement of tunneled CVC though the BCV results in a low rate of postoperative complications despite longer CVC indwelling times compared to IJV insertion. Our results suggest that BCV insertion of tunneled CVC in children may offer advantages in terms of device performance and patient safety.

    DOI: 10.1177/11297298211008084

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  • 術前に判明した右肝動脈の破格を伴う先天性胆道拡張症に対する腹腔鏡手術の工夫

    桝屋 隆太, 中目 和彦, 三好 きな, 松久保 眞, 土持 有貴, 濱田 剛臣, 今村 直哉, 旭吉 雅秀, 七島 篤志, 家入 里志

    日本膵・胆管合流異常研究会プロシーディングス   45   110 - 111   2022年9月

  • Laparoscopic dome resection for pediatric nonparasitic huge splenic cyst safely performed using indocyanine green fluorescence and percutaneous needle grasper. 査読

    Ryuta Masuya, Kazuhiko Nakame, Kosei Tahira, Kengo Kai, Takeomi Hamada, Koichi Yano, Naoya Imamura, Masahide Hiyoshi, Atsushi Nanashima, Satoshi Ieiri

    Asian journal of endoscopic surgery   15 ( 3 )   693 - 696   2022年7月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

    INTRODUCTION: In recent years, dome resection, which preserves the splenic immunological function, has been the primary technique used to treat splenic cysts. We herein report a surgical technique using a needle grasper and indocyanine green (ICG) fluorescence to perform dome resection of a huge nonparasitic splenic cyst in a pediatric patient. PATIENT AND SURGICAL TECHNIQUE: A 13-year-old girl was incidentally diagnosed with a splenic cyst during follow-up for scoliosis. Abdominal enhanced computed tomography (CT) showed a 17 × 14 × 14 cm unifocal cyst. Laparoscopic dome resection was planned. The intraoperative findings showed that the spleen was distended, but there was no apparent prominence of the thin cyst wall on the surface of the spleen. An ICG fluorescence camera overlay revealed poor coloration in the thinning area. We punctured the area and aspirated the cyst contents. We grasped the cyst wall with a percutaneous needle grasper and dissected the cyst wall with a vessel sealing system. We placed anti-adhesion agent at the dissection line to prevent recurrence. DISCUSSION: ICG fluorescence was useful for identifying the thinning area of a splenic cyst. The use of a percutaneous needle grasper facilitated the performance of dome resection of a huge splenic cyst in a pediatric patient with minimal invasiveness and an improved cosmetic outcome.

    DOI: 10.1111/ases.13052

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  • 新生児消化管穿孔と動脈管開存の関連性に関する検討 過去10年間の経験症例をもとに

    杉田 光士郎, 武藤 充, 山田 耕嗣, 山田 和歌, 桝屋 隆太, 松久保 眞, 川野 孝文, 町頭 成郎, 中目 和彦, 鳥飼 源史, 池江 隆正, 茨 聡, 家入 里志

    日本周産期・新生児医学会雑誌   58 ( Suppl.1 )   318 - 318   2022年6月

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    記述言語:日本語   出版者・発行元:(一社)日本周産期・新生児医学会  

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  • Physical growth and social prognosis of esophageal atresia after 15 years of age 査読

    Ryuta Masuya, Mitsuru Muto, Koshiro Sugita, Masakazu Murakami, Keisuke Yano, Toshio Harumatsu, Shun Onishi, Koji Yamada, Waka Yamada, Makoto Matsukubo, Takafumi Kawano, Seiro Machigashira, Kazuhiko Nakame, Motofumi Torikai, Motoi Mukai, Tatsuru Kaji, Satoshi Ieiri

    Annals of Pediatric Surgery   18 ( 1 )   2022年5月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Egypts Presidential Specialized Council for Education and Scientific Research  

    Abstract

    Background

    The mortality rate of esophageal atresia (EA) has significantly improved, but late complications remain problematic. We evaluated the physical growth, late complications, and social prognosis of postoperative patients with EA who have reached 15 years of age.

    Methods

    EA patients who were treated at our institution from 1984 to 2003 were enrolled. The follow-up, physical growth at the last visit, late complications and treatment, academic status, and employment situation were evaluated.

    Results

    Twenty-nine EA patients were registered, and the 23 surviving patients (79.3%) were followed. Anthropometry at the latest visit tended to be below the standard values. Fundoplication was performed in 6 (26.1%) of 9 (39.1%) patients with gastroesophageal reflux. Anastomotic stenosis was found in 12 patients (52.2%), and 2 (8.7%) were treated with re-anastomosis. Thirteen patients were attending a regular school, and one was attending a school for disabled children. Four had jobs from 18 years of age. Follow-up was aborted during early childhood in nine patients.

    Conclusions

    The physical size of EA was smaller than in the healthy population of the same age. Late complications had not affected the physical growth but were sometimes recognized in adolescence. The social prognosis of the patients was largely favorable.

    DOI: 10.1186/s43159-022-00185-0

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    その他リンク: https://link.springer.com/article/10.1186/s43159-022-00185-0/fulltext.html

  • Impact of the Number of Board-Certified Pediatric Surgeons per Pediatric Population on the Outcomes of Laparoscopic Fundoplication for Neurologically Impaired Patients. 査読 国際誌

    Ryuta Masuya, Mitsuru Muto, Kazuhiko Nakame, Masakazu Murakami, Koshiro Sugita, Keisuke Yano, Shun Onishi, Toshio Harumatsu, Koji Yamada, Waka Yamada, Makoto Matsukubo, Tatsuru Kaji, Atsushi Nanashima, Satoshi Ieiri

    Journal of laparoendoscopic & advanced surgical techniques. Part A   32 ( 5 )   571 - 575   2022年5月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Background and Aim: The distribution of board-certified pediatric surgeons (BCPSs) in Japan is highly biased. While Prefecture M has one of the smallest numbers of BCPSs per pediatric population, neighboring Prefecture K has one of the largest numbers of BCPSs per pediatric population. We examined the effect of BCPSs population on laparoscopic surgery and postoperative management and outcomes. Materials and Methods: We compared postoperative duration to full-dose enteral nutrition, postoperative hospital stay, and complications of neurologically impaired patients who underwent laparoscopic fundoplication in two prefectures from 2006 to 2019. Results: Laparoscopic fundoplication was performed in 17 patients in Prefecture M and 63 in K. The mean operative time was 248.8 ± 79.9 minutes in Prefecture M and 260.8 ± 94.8 in K (P = .64). The median number of days to full-dose enteral nutrition was 11.5 in Prefecture M and 10 in K (P = .29). The median postoperative hospital stay was 14 days in Prefecture M and 15 days in K (P = .38). Postoperative complications occurred in 7 cases in Prefecture M and in 10 in K. The incidence was significantly higher in Prefecture M than in K (P = .041). Conclusion: Areas with insufficient numbers of BCPSs have a higher risk of complications in laparoscopic surgery than areas with sufficient numbers.

    DOI: 10.1089/lap.2021.0713

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  • 臍帯ヘルニアから見えた腹壁破裂の遷延性貧血 国内5施設の後方視的観察研究

    杉田 光士郎, 武藤 充, 大城 清哲, 久田 正昭, 金城 僚, 桝屋 隆太, 町頭 成郎, 川野 孝文, 中目 和彦, 鳥飼 源史, 茨 聡, 加治 建, 家入 里志

    日本小児外科学会雑誌   58 ( 3 )   584 - 584   2022年4月

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    記述言語:日本語   出版者・発行元:(一社)日本小児外科学会  

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  • 術前に判明した右肝動脈の破格を伴う先天性胆道拡張症に対する腹腔鏡手術の工夫

    桝屋 隆太, 中目 和彦, 三好 きな, 松久保 眞, 七島 篤志, 家入 里志

    日本小児外科学会雑誌   58 ( 3 )   454 - 454   2022年4月

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    記述言語:日本語   出版者・発行元:(一社)日本小児外科学会  

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  • 地域医療を支える小児外科医の働き方改革はどうあるべきか? 宮崎県の場合

    永田 公二, 林田 真, 三好 きな, 谷口 直之, 桝屋 隆太, 中目 和彦, 七島 篤志, 家入 里志, 田尻 達郎

    日本小児外科学会雑誌   58 ( 3 )   352 - 352   2022年4月

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    記述言語:日本語   出版者・発行元:(一社)日本小児外科学会  

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  • 胆道閉鎖症葛西手術術後患者に対する漢方薬投与の自己肝生存率に与える効果の検証

    桝屋 隆太, 連 利博, 中目 和彦, 川野 孝文, 春松 敏夫, 山田 和歌, 町頭 成郎, 向井 基, 加治 建, 家入 里志

    日本小児外科学会雑誌   58 ( 1 )   105 - 106   2022年2月

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    記述言語:日本語   出版者・発行元:(一社)日本小児外科学会  

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  • Retroperitoneal teratomas in children: a single institution experience.

    Takafumi Kawano, Koshiro Sugita, Chihiro Kedoin, Ayaka Nagano, Mayu Matsui, Masakazu Murakami, Masato Kawano, Keisuke Yano, Shun Onishi, Toshio Harumatsu, Koji Yamada, Waka Yamada, Ryuta Masuya, Makoto Matsukubo, Mitsuru Muto, Seiro Machigashira, Kazuhiko Nakame, Motoi Mukai, Tatsuru Kaji, Satoshi Ieiri

    Surgery today   52 ( 1 )   144 - 150   2022年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    PURPOSE: Retroperitoneal teratomas (RPTs) are rare in infants. We report our experience of treating pediatric patients with RPTs over many years at a single institution, with the aim of developing a safe and secure operative strategy for RPTs in infants. METHODS: We reviewed the medical records of patients who underwent treatment for RPTs in our institution between April, 1984 and December, 2017, to analyze their background and clinical data. The diagnosis of RPT was confirmed histologically in all patients. RESULTS: The subjects of this retrospective analysis were 14 pediatric patients (female, n = 11; male, n = 4), ranging in age from 6 days to 12 years, 11 (73.3%) of whom were under 1 year of age. Complete surgical resection was performed in all patients. The tumor ruptured during surgery in four (26.7%) patients and perioperative vessel injuries occurred in six (40.0%) patients, resulting in nephrectomy in one (6.7%). Three (20.0%) patients suffered unilateral renal dysfunction as a surgical complication. Only one patient received postoperative chemotherapy. All patients were free of disease at the time of writing. CONCLUSION: Perioperative complications are not uncommon during surgery for RPTs, despite their benign nature. Preoperative imaging evaluation is important and operative management may be challenging. Because of the favorable prognosis and the frequency of adverse events in surgery, partial resection or split excision is sometimes unavoidable. Meticulous follow-up for recurrence is required for such patients.

    DOI: 10.1007/s00595-021-02327-0

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  • 小児外科専門医不在・不足地域での小児外科医療 小児外科専門医の分布が術後経過に及ぼす影響 噴門形成術における検討

    桝屋 隆太, 加治 建, 中目 和彦, 矢野 圭輔, 松久保 眞, 七島 篤志, 家入 里志

    日本臨床外科学会雑誌   82 ( 増刊 )   S173 - S173   2021年10月

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    記述言語:日本語   出版者・発行元:日本臨床外科学会  

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  • 胃穿孔による汎発性腹膜炎を生じた急性胃軸捻転の1例 査読

    桝屋 隆太, 中目 和彦, 楯 真由美, 黒木 純, 河野 文彰, 市原 明子, 池田 拓人, 武野 慎祐, 七島 篤志, 家入 里志

    日本小児外科学会雑誌   57 ( 6 )   1002 - 1007   2021年10月

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    担当区分:筆頭著者   記述言語:日本語   出版者・発行元:(一社)日本小児外科学会  

    2歳女児。3日前から反復する嘔吐で加療されていた。急激な腹部膨満から消化管穿孔を疑われ当院へ搬送された。来院時顔面蒼白、活気不良、末梢冷感著明、脈拍数200/分、血圧60/42mmHg、呼吸数43/分とショックを呈していた。腹部造影CTで多量のfree airおよび腹水を認め、胃軸捻転の所見を認めた。胃軸捻転による消化管穿孔と診断し緊急腹腔鏡手術を行った。腹腔鏡下に胃軸捻転を解除したが、穿孔部位が同定困難で開腹へ移行した。胃体上部大彎に付着した大網を剥離したところ同部位にピンホール状の穿孔を認めた。同部位を楔状に切除し胃を腹壁に固定した。遊走脾は認めなかった。術後DIC治療と胃蠕動改善に日数を要したが徐々に回復し、術後19日目に軽快退院した。その後再発なく経過している。急性胃軸捻転に伴い胃穿孔を生じた報告が散見される。重篤化して急激な経過をたどる報告もあるため、迅速な診断と治療を必要とする。(著者抄録)

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  • Malignant perivascular epithelioid cell neoplasm in the liver: report of a pediatric case. 国際誌

    Tokuro Baba, Takafumi Kawano, Yusuke Saito, Shun Onishi, Koji Yamada, Waka Yamada, Ryuta Masuya, Kazuhiko Nakame, Yota Kawasaki, Satoshi Iino, Masahiko Sakoda, Mari Kirishima, Tatsuru Kaji, Akihide Tanimoto, Shoji Natsugoe, Takao Ohtsuka, Hiroshi Moritake, Satoshi Ieiri

    Surgical case reports   7 ( 1 )   212 - 212   2021年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    BACKGROUND: Perivascular epithelioid cell neoplasm (PEComa) in a child is very rare. We herein report the first malignant case of PEComa developing in the liver of a pediatric patient. CASE PRESENTATION: A 10-year-old boy visited a private clinic with prolonged fever of unknown etiology. Abdominal ultrasonography was performed to evaluate the fever's origin, revealing a large tumor in the liver. He was thus referred to a nearby hospital to investigate the tumor further. Enhanced computed tomography (CT) showed a 6.8 × 5.9 × 10.5-cm solid lesion on S4 and S5. On magnetic resonance imaging (MRI), the tumor had a low signal intensity on T1 imaging and high signal intensity on T2 imaging, with partial diffusion restriction. 18F-fluorodeoxyglucose-positron emission tomography (FDG-PET) showed a marked uptake in the mass lesion with no evidence of metastasis. The patient was negative for all tumor markers, including AFP, CEA and PIVKA-II. The results of a needle biopsy suggested hepatocellular carcinoma. The tumor's rapid growth suggested malignancy. Hepatic segmentectomy (S4 + S5 + S8) was performed. The tumor was resected en bloc with a margin. Microscopically, the tumor showed atypical spindle, polygonal or oval-shaped cells with a high nuclear grade, and vascular invasion. Immunohistochemistry was positive for alpha-smooth muscle antigen (α-SMA), human melanin black-45 (HMB-45) and melan A. The pathological diagnosis was malignant PEComa. In the 6 months after surgery, the patient complained of shoulder pain. MRI showed a dumbbell-shaped tumor at the 2nd thoracic vertebrae, which was confirmed to be bone metastasis of PEComa. After chemotherapy, including ifosfamide and doxorubicin, vertebrectomy was performed. Two years later, thoracoabdominal CT showed a 10-cm solid mass occupying the pelvis and a 15-mm nodule in the middle lobe of the right lung. Under a diagnosis of peritoneal and lung metastases, they were surgically removed and metastasis of PEComa was pathologically confirmed. Four months after the 2nd relapse, pelvic metastasis appeared again and mTOR (mammalian target of rapamycin) inhibitor was initiated. To our knowledge, this is the first report of malignant hepatic PEComa in a pediatric patient. CONCLUSION: Although extremely rare, malignant hepatic PEComa can develop in a child.

    DOI: 10.1186/s40792-021-01300-w

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  • Laparoscopic repositioning of an aberrant right hepatic artery and hepaticojejunostomy for pediatric choledochal cyst: A case report. 査読 国際誌

    Ryuta Masuya, Kina Miyoshi, Kazuhiko Nakame, Atsushi Nanashima, Satoshi Ieiri

    International journal of surgery case reports   86   106300 - 106300   2021年9月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

    INTRODUCTION: The right hepatic artery crossing the ventral side of the common hepatic duct is a relatively frequent abnormality. This aberrant right hepatic artery not only interferes with dissection of the common bile duct and hepaticojejunostomy for choledochal cyst but can also cause postoperative anastomotic stenosis. CASE PRESENTATION: A 14-year-old patient presented with upper abdominal pain and was diagnosed with a choledochal cyst (Type IVA in Todani Classification) and pancreaticobiliary maljunction. Abdominal enhanced computed tomography showed aberrant right hepatic artery located at the ventral side of the common hepatic duct. Laparoscopic choledochal cyst resection and hepaticojejunostomy were planned. Intraoperative findings also showed the aberrant right hepatic artery crossing the common hepatic duct ventrally as detected on preoperative computed tomography. Laparoscopic dorsal side repositioning of the aberrant right hepatic artery was performed because it appeared to compress the common hepatic duct and risked causing postoperative anastomotic stenosis. We performed laparoscopic hepaticojejunostomy by replacing the aberrant right hepatic artery dorsally to facilitate suturing and prevent postoperative anastomotic stenosis. The postoperative course was uneventful, with no findings suggestive of anastomotic stenosis. DISCUSSION: The abnormality of the right hepatic artery is reported to be a primary cause of anastomotic stenosis after hepaticojejunostomy. Once anastomotic stenosis or stricture develops, it is often difficult to treat. The prevention of the stenosis is important. CONCLUSIONS: In choledochal cyst with aberrant right hepatic artery, dorsal repositioning is effective for preventing postoperative anastomotic stenosis and cholestasis.

    DOI: 10.1016/j.ijscr.2021.106300

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  • Discrepancy between the survival rate and neuropsychological development in postsurgical extremely low-birth-weight infants: a retrospective study over two decades at a single institution. 国際誌

    Mitsuru Muto, Koshiro Sugita, Satoshi Ibara, Ryuta Masuya, Makoto Matuskubo, Takafumi Kawano, Yumiko Saruwatari, Seiro Machigashira, Koichi Sakamoto, Kazuhiko Nakame, Shin Shinyama, Motofumi Torikai, Yoshihiro Hayashida, Motoi Mukai, Takamasa Ikee, Ryuichi Shimono, Hiroyuki Noguchi, Satoshi Ieiri

    Pediatric surgery international   37 ( 3 )   411 - 417   2021年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    PURPOSE: Necrotizing enterocolitis (NEC), focal intestinal perforation (FIP), and meconium-related ileus (MRI) are major diseases that cause gastrointestinal disorders in extremely low-birth-weight infants (ELBWIs). We conducted a review to compare the postoperative outcomes of ELBWIs with these diseases in our neonatal intensive-care unit. METHODS: A retrospective chart review of ELBWIs surgically treated for NEC (n = 31), FIP (n = 35), and MRI (n = 16) in 2001-2018 was undertaken. This period was divided into early (2001-2005), middle (2006-2010), and late (2011-2018) periods. Data were analyzed with the Cochran-Armitage test. Statistical significance was defined as p < 0.05. RESULTS: The survival rates in ELBWIs with NEC (early/middle/late: 36.4%/42.9%/61.5%; p = 0.212) and FIP (20%/50%/70.6%; p = 0.012) improved over time; all patients with MRI survived. The neuropsychological development of 24 cases was assessed with the Kyoto Scale of Psychological Development in the Postural-Motor, Cognitive-Adaptative, and Language-Social domains. The mean developmental quotient of all domains was 68.4 (range 18-95) at corrected 1.5 years of age and 69.1 (range 25-108) at chronological 3 years of age, both were considered as poor development. There was no improvement over time (p = 0.899). CONCLUSION: Ideal neuropsychological development was not observed with the improvement of survival rate. Less-invasive surgical intervention and adequate postoperative care are required to encourage further development.

    DOI: 10.1007/s00383-020-04825-7

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  • Microvascular proliferation of the portal vein branches in the liver of biliary atresia patients at Kasai operation is associated with a better long-term clinical outcome. 国際誌

    Toshio Harumatsu, Toshihiro Muraji, Ryuta Masuya, Haruo Ohtani, Taichiro Nagai, Keisuke Yano, Shun Onishi, Koji Yamada, Waka Yamada, Makoto Matsukubo, Mitsuru Muto, Tatsuru Kaji, Satoshi Ieiri

    Pediatric surgery international   35 ( 12 )   1437 - 1441   2019年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    AIM OF THE STUDY: We previously showed an increased number of smaller portal vein (PV) branches in the portal areas of liver biopsy specimens of biliary atresia (BA) patients. We evaluated the correlation between this histopathological feature and the prognosis. PATIENTS AND METHODS: Twenty-five consecutive patients with BA encountered between 2000 and 2012 were classified into three prognostic groups based on their postoperative outcomes: Excellent (n = 11) for native-liver survivors with a normal liver function, Good (n = 6) for native-liver survivors with liver dysfunction, and Poor (n = 8) for survivors after liver transplant or on a waiting list. Data from morphometrical analyses, including the fibrotic portal area, numbers of PVs, diameter and total area of PV branches, were statistically compared among the three groups. MAIN RESULTS: The number of PV branches per unit area of the whole-liver specimen in the poor prognostic group was significantly lower than that in the excellent group (3.1 ± 0.6 vs. 5.2 ± 2.0/mm2, p = 0.03). There were no significant differences in the other parameters. CONCLUSIONS: This is the first report on the relationships between morphometrically analyzed PV branches and the postoperative course in BA patients. The portal venous system is involved as the primary lesion in BA.

    DOI: 10.1007/s00383-019-04579-x

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  • 異なるアプローチで治療した先天性門脈体循環シャントの3例

    村上 雅一, 春松 敏夫, 矢野 圭輔, 馬場 徳朗, 大西 峻, 山田 耕嗣, 山田 和歌, 桝屋 隆太, 中目 和彦, 家入 里志

    日本小児外科学会雑誌   55 ( 6 )   1091 - 1098   2019年10月

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    記述言語:日本語   出版者・発行元:(一社)日本小児外科学会  

    先天性門脈体循環シャント(以下、本症)は肝肺症候群や肝性脳症などを生じる疾患でシャント血流遮断が根治治療となる。今回、異なるアプローチで治療した本症3例を経験した。1例は1歳女児で腹腔鏡下肝切除によるシャント血管遮断術を施行。2例目は心疾患合併の10ヵ月男児で開腹でシャント血管バンディングを施行。3例目は17歳男児でコイル塞栓術を施行した。本症は肺高血圧など重篤な合併症の可能性があり積極的に治療すべきであるが、年齢・病型も異なり標準的な治療アプローチが存在しない。肝内門脈の低形成が軽度で閉塞試験で門脈圧25mmHg未満の症例は一期的血流遮断の適応、肝内門脈が著しく低形成もしくは門脈圧25mmHg以上の症例は二期的血流遮断の適応としている。術式は低侵襲なinterventional radiology(IVR)が望ましいがシャント血管の位置や肝内門脈の形成程度などを複合的に考えて選択すべきである。(著者抄録)

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    その他リンク: https://search.jamas.or.jp/default/link?pub_year=2019&ichushi_jid=J01113&link_issn=&doc_id=20191105140038&doc_link_id=%2Fes5shoge%2F2019%2F005506%2F011%2F1091-1098%26dl%3D0&url=https%3A%2F%2Fwww.medicalonline.jp%2Fjamas.php%3FGoodsID%3D%2Fes5shoge%2F2019%2F005506%2F011%2F1091-1098%26dl%3D0&type=MedicalOnline&icon=https%3A%2F%2Fjk04.jamas.or.jp%2Ficon%2F00004_2.gif

  • A Comparison of the Effectiveness Between Three Different Endoscopic Surgical Skill Training Programs for Medical Students Using the Infant Laparoscopic Fundoplication Simulator: A Randomized Controlled Trial. 国際誌

    Shun Onishi, Takamasa Ikee, Masakazu Murakami, Keisuke Yano, Toshio Harumatsu, Tokuro Baba, Koji Yamada, Waka Yamada, Ryuta Masuya, Seiro Machigashira, Kazuhiko Nakame, Motoi Mukai, Tatsuru Kaji, Satoshi Ieiri

    Journal of laparoendoscopic & advanced surgical techniques. Part A   29 ( 10 )   1252 - 1258   2019年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Background and Aim: Training programs for developing laparoscopic suturing skills range from dry-box training to virtual simulator training. There are advantages and disadvantages to each training method; however, which training is best for medical students and young surgeons is unclear. The aim of this study was to compare the proficiency of medical students in acquiring laparoscopic suturing skills after various routes of short-term training: via a video, an expert teacher, or a virtual simulator. Materials and Methods: Seventeen medical students were registered and divided randomly into three groups: group receiving personal training while watching a training video (video group), group receiving training under the guidance of an expert (teaching group), and group receiving personal training with a virtual simulator (virtual group). The students practiced laparoscopic suturing and tying skills for 1 hour. Following their training, they performed the evaluation task of three sutures and ties using a laparoscopic fundoplication simulator. We developed a 1-year-old infant body model (body weight 10 kg) based on computed tomography data and established a pneumoperitoneum body model based on a clinical situation. Results: The path length of the assistant forceps in the virtual group tended to be longer than in the other groups. The average acceleration of the assistant forceps in the virtual group was faster than in the other groups (P = .04). There were no significant differences in the other evaluation parameters. Conclusion: A long-term and combination training study should be performed to develop the best method for training medical students and inexperienced young surgeons.

    DOI: 10.1089/lap.2019.0212

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  • Impact and characteristics of two- and three-dimensional forceps manipulation using laparoscopic hepaticojejunostomy mimicking a disease-specific simulator: a comparison of pediatric surgeons with gastrointestinal surgeons. 国際誌

    Koji Yamada, Masakazu Murakami, Keisuke Yano, Tokuro Baba, Toshio Harumatsu, Shun Onishi, Waka Yamada, Ryuta Masuya, Seiro Machigashira, Kazuhiko Nakame, Motoi Mukai, Tatsuru Kaji, Satoshi Ieiri

    Pediatric surgery international   35 ( 10 )   1051 - 1057   2019年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    PURPOSE: This study assessed the impact of 2D and 3D environments by comparing pediatric surgeons (PS) and gastrointestinal surgeons (GIS) using a laparoscopic hepaticojejunostomy simulator. METHODS: We developed a high-fidelity simulator of laparoscopic hepaticojejunostomy. Thirty-five participants (19 PS and 16 GIS) performed hepaticojejunostomy in both 2D and 3D environments. We evaluated the required time, total path length, and average velocities of bilateral forceps in both situations using the para-axial port layout. RESULTS: Regarding the participants' characteristics, the performance history of laparoscopic hepaticojejunostomy differed significantly between PS and GIS. In PS, the 3D environment did not markedly affect compared with 2D. In GIS, however, the 3D environment affected the time and movement of the right forceps. There were no significant differences in the time between PS and GIS in either environment. In both environments, the right-hand movement of the PS group was shorter and slower than that of the GIS group, but the left-hand movement was the opposite. CONCLUSION: There were significant differences in forceps movement characteristics between the PS and GIS. The effects of a 3D environment could not be clarified in this study, because it may depend on the port layout used and the operative procedures.

    DOI: 10.1007/s00383-019-04538-6

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  • Impact and Characteristics of Forceps Manipulation of Three-Dimensional in Laparoscopic Hepaticojejunostomy Mimicking a Disease-Specific Simulator: A Comparison of Expert with Trainee. 国際誌

    Koji Yamada, Masakazu Murakami, Keisuke Yano, Tokuro Baba, Toshio Harumatsu, Shun Onishi, Waka Yamada, Ryuta Masuya, Seiro Machigashira, Kazuhiko Nakame, Motoi Mukai, Tatsuru Kaji, Satoshi Ieiri

    Journal of laparoendoscopic & advanced surgical techniques. Part A   29 ( 10 )   1378 - 1382   2019年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Purpose: Various studies have shown the benefit of three-dimensional (3D) systems over two-dimensional (2D) systems in endoscopic surgery. However, few studies have focused on pediatric endosurgery. The purpose of this study was to assess the impact of 2D and 3D environments on the time taken and forceps manipulation by comparing experts and trainees using a laparoscopic hepaticojejunostomy simulator. Methods: We have developed a simulator of laparoscopic hepaticojejunostomy for congenital biliary dilatation. Seventeen participants of pediatric surgeons (4 experts and 13 trainees) performed hepaticojejunostomy using our simulator in both 2D and 3D environment. We evaluated the required time, total path length, and average velocities of bilateral forceps in both situations. Results: Obtained results show the findings for the required time (seconds; 2D, experts: 810.43 ± 321.64 vs. trainees: 1136.02 ± 409.96, P = .17) (seconds; 3D, experts: 660.21 ± 256.48 vs. trainees: 1017 ± 280.93, P = .039), total path length of right forceps (mm; 2D, experts: 38838.23 ± 30686.63 vs. trainees: 52005.47 ± 31675.02, P = .48)(mm; 3D, experts: 24443.09 ± 12316.32 vs. trainees: 45508.09 ± 26926.27, P = .16), total path length of left forceps (mm; 2D, experts: 131635.54 ± 71669.94 vs. trainees: 245242.48 ± 130940.25, P = .48)(mm; 3D, experts: 88520.42 ± 56766.63 vs. trainees: 230789.75 ± 107315.85, P = .024), average velocities of right forceps (mm/second; 2D, experts: 44.80 ± 21.85 vs. trainees: 44.37 ± 18.92, P = .97) (mm/second; 3D, experts: 37.28 ± 16.49 vs. trainees: 42.58 ± 14.40, P = .54), average velocities of left forceps (mm/second; 2D, experts: 156.65 ± 38.69 vs. trainees: 202.58 ± 63.80, P = .20) (mm/second; 3D, experts: 125.64 ± 44.30 vs. trainees: 219.42 ± 43.82, P < .01). Conclusion: The experts performed more effectively when using the 3D system. Using 3D, the total path length of the left forceps of expert pediatric surgeons was significantly shorter than trainee pediatric surgeons, and the average velocities of the left forceps tip of expert pediatric surgeons was significantly slower than trainee pediatric surgeons. These results suggest that training of assisting hand is necessary for advanced pediatric endosurgery to avoid organ injury.

    DOI: 10.1089/lap.2019.0211

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  • 小児腸重積症に対する超音波下整復術の有効性と安全性

    苔口 知樹, 神薗 淳司, 桝屋 隆太, 新山 新, 小野 友輔, 石橋 紳作, 天本 正乃, 市川 光太郎

    日本小児救急医学会雑誌   18 ( 3 )   338 - 342   2019年10月

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    記述言語:日本語   出版者・発行元:(一社)日本小児救急医学会  

    【目的】小児腸重積症に対する超音波下整復術とX線透視下整復術の有用性と安全性を比較検討する。【対象と方法】腸重積症に対して超音波下整復術を実施した41名(US群)とX線透視下整復術を実施した82名(FS群)について、後方視的に検討した。【結果】初回整復率はUS群100%、FS群83.5%とUS群の方が有意に高かった(p=0.009)。整復率、再発率、手術を要した割合、整復に要した時間には両群間で差はなかった。両群とも有害事象はなかった。【結論】超音波下整復術は、放射線被曝を回避でき、有効かつ安全である。超音波下整復術は腸重積症の非観血的整復術の第一選択となる可能性がある。(著者抄録)

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  • The change over time in the postoperative bowel function in male anorectal malformation patients who underwent sacroperineal anorectoplasty and sacroabdominoperineal anorectoplasty. 国際誌

    Toshio Harumatsu, Masakazu Murakami, Keisuke Yano, Shun Onishi, Koji Yamada, Waka Yamada, Ryuta Masuya, Takafumi Kawano, Seiro Machigashira, Kazuhiko Nakame, Motoi Mukai, Tatsuru Kaji, Satoshi Ieiri

    Pediatric surgery international   35 ( 10 )   1109 - 1114   2019年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    PURPOSE: Many kinds of operative procedures have been proposed for anorectal malformation (ARM) patients. At our institution, sacroperineal or sacroabdominoperineal anorectoplasty (SP-SAP) have been performed from 1984 to 2007. The aim of this study is clarify the change over the time in the postoperative bowel function in male ARM patients. METHODS: Patient data were collected from 1984 to 2007. Fifty-two male patients with high- and intermediate-type ARM were enrolled. The patients' characteristics and bowel function were reviewed and analyzed retrospectively. The bowel function was evaluated according to the evacuation score (ES) of the Japan Society of ARM Study Group. RESULTS: The operative procedures were SP-SAP in 52 male patients. The total ES improved chronologically and significantly until 11 years of age. Regarding the clinical stratification of the ES, the ratio of "excellent" and "good" results was over 91.9% at 11 years of age. A satisfactory bowel movement score was achieved by 9 years of age. The constipation, incontinence and soiling scores improved slowly but continuously until 11 years of age. CONCLUSION: The ES showed continuous improvement after a definitive operation. An understanding of the characteristics of improvement is very important in managing the postoperative bowel function in ARM patients.

    DOI: 10.1007/s00383-019-04540-y

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  • Rare pediatric case of Meckel diverticulum penetration caused by a fish bone. 査読 国際誌

    Ryuta Masuya, Kohji Okamoto, Hideo Kidogawa, Junji Kamizono, Satoshi Ieiri

    Pediatrics international : official journal of the Japan Pediatric Society   61 ( 7 )   731 - 733   2019年7月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1111/ped.13902

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  • Analysis of the risk of ovarian torsion in 49 consecutive pediatric patients treated at a single institution

    Koshiro Sugita, Takafumi Kawano, Mukai Motoi, Toshihiro Muraji, Shun Onishi, Tomoe Moriguchi, Koji Yamada, Waka Yamada, Ryuta Masuya, Seiro Machigashira, Kazuhiko Nakame, Tatsuru Kaji, Satoshi Ieiri

    World Journal of Pediatric Surgery   2 ( 2 )   2019年6月

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    掲載種別:研究論文(学術雑誌)  

    Purpose: An early diagnosis of ovarian torsion is sometimes difficult due to variable clinical symptoms and non-specific imaging findings. We retrospectively reviewed patients with pediatric ovarian masses manifesting torsion. Methods: Fifty-eight ovarian masses (55 episodes) in 49 non-neonatal patients treated from April 1984 to March 2017 were retrospectively analyzed. The Mann-Whitney U test and Fisher's exact test were used for the statistical analysis. Results: The median age of these 55 episodes was 10.5 years old (range 1.0-23.0). Thirty-three patients presented with abdominal pain. Forty-five tumors and 13 cystic masses were resected and diagnosed pathologically (50 benign and 8 malignant). Torsion was identified in 15 cases (25.9%) at operation. The torsion masses were all benign, and 8 ovaries (53.3%) were successfully preserved. Comparing the torsion cases with the nontorsion cases, only the white cell count was significantly higher in the torsion cases (p=0.0133) and in the patients presented with abdominal pain (p=0.0068). The duration of abdominal pain was significantly shorter in ovary preserved cases than in oophorectomy cases. Conclusion: The white blood cell may be a helpful indicator of the presence of torsion as well as the need for surgery.

    DOI: 10.1136/wjps-2018-000009

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  • The long-term health-related quality of life in patients operated for choledochal cyst. 国際誌

    Tokuro Baba, Motoi Mukai, Ryuta Masuya, Masato Kawano, Keisuke Yano, Masakazu Murakami, Shun Onishi, Koji Yamada, Waka Yamada, Takafumi Kawano, Seiro Machigashira, Kazuhiko Nakame, Tatsuru Kaji, Satoshi Ieiri

    Pediatric surgery international   35 ( 5 )   539 - 546   2019年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    PURPOSE: Late postoperative complications in choledochal cyst (CC) patients are severe problems that affect the quality of life (QOL). We evaluated the postoperative complications and health-related QOL (HRQOL) of CC patients ≥ 18 years of age. METHODS: From April 1984 to January 2018, 114 CC patients underwent definitive surgery at our institution. Seventy-nine patients reached ≥ 18 years of age. The HRQOL was assessed using the Japanese version of the SF-36v2. Eight health domain (physical functioning, role-physical, body pain, general health, role-emotional, vitality, mental health, and social functioning) scores and three component summary [physical component summary, mental component summary (MCS), and role-social component summary] scores were compared between the patients with and without complications (C [+] vs. C [-]). RESULTS: Thirty-five patients answered the questionnaires. Twelve patients had postoperative complications. Among the eight domains, the score of general health was significantly lower in C [+] patients than in C [-] patients (p = 0.0488). Among the three component scores, the MCS score in C [+] patients was lower than in C [-] patients without significance (p = 0.0953). CONCLUSIONS: The HRQOL of CC patients ≥ 18 years of age was mostly acceptable. However, postoperative complications can impair the sense of well-being and affect the mental health.

    DOI: 10.1007/s00383-019-04456-7

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  • A Randomized Trial to Compare the Conventional Three-Port Laparoscopic Appendectomy Procedure to Single-Incision and One-Puncture Procedure That Was Safe and Feasible, Even for Surgeons in Training. 国際誌

    Tomoe Moriguchi, Seiro Machigashira, Koshiro Sugita, Masato Kawano, Keisuke Yano, Shun Onishi, Koji Yamada, Waka Yamada, Ryuta Masuya, Takafumi Kawano, Kazuhiko Nakame, Motoi Mukai, Tatsuru Kaji, Satoshi Ieiri

    Journal of laparoendoscopic & advanced surgical techniques. Part A   29 ( 3 )   392 - 395   2019年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    BACKGROUND: Single-incision laparoscopic surgery has emerged; however, the procedures might be complicated for trainees. We compared the clinical outcomes of conventional three-port laparoscopic appendectomy (CLA) and single-incision and one-puncture laparoscopic appendectomy (SIOPLA) by attending pediatric surgeons (APSs) and surgeons in training (SITs). MATERIALS AND METHODS: We reviewed the clinical outcomes of 72 randomized laparoscopic appendectomies that were consecutively performed by SITs and APSs for a 2-year period. The cases were categorized according to type of surgeon. Finally, 10 CLA and 18 SIOPLA procedures were performed by SITs, and 24 CLA and 20 SIOPLA procedures were performed by APSs. The operative time, blood loss, analgesic use, complications, and hospital stay were analyzed. RESULTS: There were no significant differences in any of the evaluation points between CLA and SIOPLA. CONCLUSIONS: SIOPLA is not inferior operation to CLA, and the postoperative outcomes of SIOPLA were satisfactory. Thus, SIOPLA was safe and feasible for young surgeons to perform.

    DOI: 10.1089/lap.2018.0195

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  • The effect of intravenous lipid emulsions and mucosal adaptation following massive bowel resection. 国際誌

    Shun Onishi, Tatsuru Kaji, Seiro Machigashira, Waka Yamada, Ryuta Masuya, Kazuhiko Nakame, Masato Kawano, Keisuke Yano, Koji Yamada, Takafumi Kawano, Motoi Mukai, Takako Yoshioka, Akihide Tanimoto, Satoshi Ieiri

    Journal of pediatric surgery   53 ( 12 )   2444 - 2448   2018年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    AIMS AND OBJECTIVES: Fish oil (FO) lipid emulsion and a new lipid emulsion (SMOF) are important treatments for intestinal failure-associated liver disease. We evaluated the efficacy of FO and SMOF lipid emulsion on intestinal mucosal adaptation using a total parenteral nutrition (TPN)-supported rat model of short bowel syndrome. MATERIAL & METHODS: Sprague-Dawley rats underwent jugular vein catheterization and 90% small bowel resection and were divided into three groups: TPN with soy bean oil lipid emulsion (SO group), FO lipid emulsion (FO group), or SMOF (SMOF group). On day 13, the rats were euthanized, and the small intestine was harvested. The microscopic morphology and crypt cell proliferation rate (CCPR) were then evaluated. RESULTS: The villus height of the ileum in the SMOF group was significantly higher than in the SO group. The crypt depth of the intestine in the SMOF group was significantly lower than in the SO group. The CCPRs of the intestine in the FO and SMOF groups were both higher than in the SO group. CONCLUSIONS: Lipid emulsion affected the bowel morphology, such as the mucosa as well as the intestinal smooth muscle. Further studies are needed to clarify the mechanisms.

    DOI: 10.1016/j.jpedsurg.2018.08.019

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  • Predictive factors affecting the prognosis and late complications of 73 consecutive cases of esophageal atresia at 2 centers. 査読 国際誌

    Ryuta Masuya, Tatsuru Kaji, Motoi Mukai, Kazuhiko Nakame, Takafumi Kawano, Seiro Machigashira, Waka Yamada, Koji Yamada, Shun Onishi, Keisuke Yano, Tomoe Moriguchi, Koshiro Sugita, Masato Kawano, Hiroyuki Noguchi, Masaya Suzuhigashi, Mitsuru Muto, Satoshi Ieiri

    Pediatric surgery international   34 ( 10 )   1027 - 1033   2018年10月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

    PURPOSE: While the diagnosis and outcomes of esophageal atresia (EA) have improved, associated anomalies, the management of late complications and growth remain major issues. We analyzed factors that affected the prognosis, late complications and growth. METHODS: We retrospectively reviewed EA patients treated at two centers from 1984 to 2016. Patient characteristics, complications (gastroesophageal reflux [GER], anastomotic stenosis, tracheomalacia, dysphagia) and growth were evaluated. RESULTS: Seventy-three EA patients were treated (overall survival rate:80.8%). The mean birth weight was 2514 ± 509 g in the surviving group, and 2453 ± 567 g in the fatal group excluded chromosomal abnormality (p = 0.76). Cardiac and chromosomal anomalies significantly affected mortality. Postoperative GER and anastomotic stenosis each occurred in 39% of the patients. Only GER was significantly affected by the Gross classification. The standard deviation (SD) values of the EA patients' growth were all lower than in the normal population. The SD of body weight was significantly lower in patients with extremity anomalies. CONCLUSIONS: Associated cardiac and chromosomal anomalies significantly affected the prognosis. GER and anastomotic stenosis were the most common late complications. The growth of the surviving cases was insufficient. These factors will help optimize the therapeutic strategies and postoperative management for EA.

    DOI: 10.1007/s00383-018-4326-1

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  • Long-term outcomes of surgery for choledochal cysts: a single-institution study focusing on follow-up and late complications.

    Motoi Mukai, Tatsuru Kaji, Ryuta Masuya, Koji Yamada, Koshiro Sugita, Tomoe Moriguchi, Shun Onishi, Waka Yamada, Takafumi Kawano, Seiro Machigashira, Kazuhiko Nakame, Hideo Takamatsu, Satoshi Ieiri

    Surgery today   48 ( 9 )   835 - 840   2018年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    PURPOSE: The late postoperative complications of choledochal cyst (CC) surgery are serious and include intrahepatic stones and biliary carcinoma; therefore, long-term follow-up is crucial. METHODS: The subjects of this retrospective study were patients who underwent surgery for CC at Kagoshima University Hospital between April, 1984 and December, 2016. We analyzed the operative results, early and late postoperative complications, and postoperative follow-up rate. RESULTS: The study population comprised 110 CC patients (male/female: 33/77) with a median age at surgery of 4 years, 3 months (range 12 days-17 years). The patients underwent hepaticoduodenostomy (n = 1; 0.9%) or hepaticojejunostomy (n = 109; 99.1%). Late complications included intrahepatic bile duct (IHBD) dilatation (n = 1; 0.9%), IHBD stones (n = 3; 2.7%), and adhesive ileus (n = 4; 3.6%). There was no incidence of biliary carcinoma in this series. The rates of follow-up at our institute within 10 years of surgery and more than 20 years after surgery were 69.2% (18 of 26) and 14.5% (8 of 55), respectively. CONCLUSIONS: The follow-up rate after definitive surgery declined with time. Late complications were observed within 20 years, but biliary carcinoma was not observed. The follow-up rate should be increased to detect late complications. Moreover, patient education on long-term follow up is essential to prevent life-threatening events after definitive surgery for CC.

    DOI: 10.1007/s00595-018-1660-9

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  • Ghrelin stimulates intestinal adaptation following massive small bowel resection in parenterally fed rats. 国際誌

    Shun Onishi, Tatsuru Kaji, Waka Yamada, Kazuhiko Nakame, Seiro Machigashira, Masato Kawano, Keisuke Yano, Toshio Harumatsu, Koji Yamada, Ryuta Masuya, Takafumi Kawano, Motoi Mukai, Taiji Hamada, Masakazu Souda, Takako Yoshioka, Akihide Tanimoto, Satoshi Ieiri

    Peptides   106   59 - 67   2018年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    BACKGROUND: Since short bowel syndrome (SBS) patients face life-threatening conditions, the development of therapeutic strategies to induce intestinal adaptation has been investigated. Ghrelin, a ligand of growth hormone (GH) secretagogue-receptor that stimulates the release of GH and insulin like growth factor-1 (IGF-1), has several pleiotropic effects. We investigated whether ghrelin induces intestinal adaptation in parenterally fed rats with SBS. METHODS: Sprague-Dawley rats underwent venous catheterization and were divided into 3 groups: those receiving 90% small bowel resection while leaving the proximal jejunum and distal ileum (90% SBR) with TPN (SBS/TPN group), those receiving 90% SBR with TPN + ghrelin (SBS/TPN/ghrelin group), and those receiving sham operation and fed chow (sham group). Ghrelin was administered intravenously at 10 μg/kg/day. On Day 13, the rats were euthanized and the small intestine harvested, and the histology and crypt cell proliferation rates (CCPR), apoptosis, and nutrient transporter protein levels were analyzed and the plasma hormones were measured. RESULTS: The villus height and crypt depth of the ileum in the SBS/TPN/ghrelin group were significantly higher than in the SBS/TPN group. The CCPR of the jejunum and the ileum significantly increased by the administration of ghrelin; however, the apoptosis rates did not significantly differ between the SBS/TPN and SBS/TPN/ghrelin groups. Significant differences did not exist in the plasma IGF-1 and nutrient transporter protein levels among three groups. CONCLUSIONS: The intravenous administration of ghrelin stimulated the morphological intestinal adaptation of the ileum to a greater degree than the jejunum due to the direct effect of ghrelin.

    DOI: 10.1016/j.peptides.2018.06.009

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  • The protective effect of fish oil lipid emulsions on intestinal failure-associated liver disease in a rat model of short-bowel syndrome. 国際誌

    Seiro Machigashira, Tatsuru Kaji, Shun Onishi, Waka Yamada, Keisuke Yano, Koji Yamada, Ryuta Masuya, Takafumi Kawano, Kazuhiko Nakame, Motoi Mukai, Satoshi Ieiri

    Pediatric surgery international   34 ( 2 )   203 - 209   2018年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    PURPOSE: Pediatric patients with intestinal failure need long-term parenteral nutrition (PN), but this nutritional support causes liver dysfunction, such as intestinal failure-associated liver disease (IFALD). Several studies have shown that the lipid emulsion produced by soybean oil (SO) is associated with the occurrence of IFALD. In this study, we evaluated the effect of SO and fish oil (FO) lipid emulsion on hepatic steatosis. METHODS: Sprague-Dawley rats underwent jugular vein catheterization and were divided into three groups: sham operation with normal chow (Sham group), 80% small bowel resection (80% SBR) + TPN with SO lipid emulsion (SO group), and 80% SBR + TPN with FO lipid emulsion (FO group). All rats were euthanized and the serum biochemistry and hepatic histology analyzed. RESULTS: No significant differences in the serum liver or biliary enzymes were noted between the SO and FO groups. The pathological findings and NAFLD score in the FO group did not show steatosis and were significantly lower than in the SO group. An analysis of the fatty acids profile in the both the SO and FO groups did not indicate essential fatty acid deficiency (EFAD). CONCLUSION: FO lipid emulsion may have a protective role against steatosis of IFALD without EFAD.

    DOI: 10.1007/s00383-017-4190-4

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  • The bowel function and quality of life of Hirschsprung disease patients who have reached 18 years of age or older - the long-term outcomes after undergoing the transabdominal soave procedure. 国際誌

    Shun Onishi, Kazuhiko Nakame, Tatsuru Kaji, Masato Kawano, Tomoe Moriguchi, Koshiro Sugita, Keisuke Yano, Mioko Nomura, Koji Yamada, Waka Yamada, Ryuta Masuya, Takafumi Kawano, Seiro Machigashira, Motoi Mukai, Satoshi Ieiri

    Journal of pediatric surgery   52 ( 12 )   2001 - 2005   2017年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    BACKGROUND/PURPOSE: Hirschsprung disease (HD) is considered curable, but the postoperative bowel function is not always satisfactory. In this study, we evaluated the general condition, bowel function, and social performance in adults who were older than 17years of age who had undergone definitive operations in childhood. METHOD: From 1984 to 2016, 110 patients with HD underwent definitive surgery at our institute. Sixty-three patients who had undergone the transabdominal Soave procedure reached 18years of age. Their present status and symptoms, anorectal function, genitourinary function, and social performance were evaluated during the clinical follow-up via a questionnaire survey. RESULT: The mean age of the questionnaire respondents was 25.0 (19-37) years. The bowel function was mostly good. However, 56% of patients had abdominal pain more than once a week. Regarding evacuation symptoms, incontinence and soiling occurred in 18.7%. Among the respondents 33.3% were married, and 60% of those who were married had children. The respondents had achieved success in their education and professional careers. CONCLUSION: The bowel function of most patients was satisfactory, although some had chronic abdominal symptoms. Pediatric surgeons should continue trying to achieve complete bowel function after definitive surgery of HD. TYPE OF STUDY: Prospective Cohort Study. LEVEL OF EVIDENCE: Level III.

    DOI: 10.1016/j.jpedsurg.2017.08.036

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  • Predictors of a successful outcome for infants with short bowel syndrome: a 30-year single-institution experience.

    Tatsuru Kaji, Kazuhiko Nakame, Seiro Machigashira, Takafumi Kawano, Ryuta Masuya, Waka Yamada, Koji Yamada, Shun Onishi, Tomoe Moriguchi, Koshiro Sugita, Motoi Mukai, Satoshi Ieiri

    Surgery today   47 ( 11 )   1391 - 1396   2017年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    PURPOSE: Short-bowel syndrome (SBS) is associated with high morbidity and mortality. We conducted this study to establish the predictors of survival and weaning off parenteral nutrition (PN). METHODS: We reviewed the medical records of 16 SBS infants treated at our institution within a 30-year period. SBS was defined as a residual small-bowel length (RSBL) of <75 cm. Loss of the ileocecal valve (ICV), cholestasis (D-Bil >2.0 mg/dl), enterostomy, and RSBL were all evaluated. Kaplan-Meier analysis was used to analyze the predictors. RESULTS: The mean RSBL was 34.9 ± 22.9 cm. Six patients died (37.5%) and nine patients were weaned off PN (56.3%). Significant differences were observed in cholestasis (p < 0.03), enterostomy (p < 0.01), an absolute RSBL of <30 cm (p < 0.04), and a percentage of expected RSBL of <10% (p < 0.04) as survival predictors. Significant differences were also observed for cholestasis (p < 0.01), loss of the ICV (p < 0.04), an absolute RSBL of <20 cm (p < 0.01), and a percentage of expected RSBL of <10% (p < 0.03) as predictors of weaning off PN. CONCLUSION: These predictors may help us select the optimal treatments for pediatric patients with SBS.

    DOI: 10.1007/s00595-017-1534-6

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  • A comparison of the characteristics and precision of needle driving for right-handed pediatric surgeons between right and left driving using a model of infant laparoscopic diaphragmatic hernia repair. 国際誌

    Takamasa Ikee, Shun Onishi, Motoi Mukai, Takafumi Kawano, Koshiro Sugita, Tomoe Moriguchi, Koji Yamada, Waka Yamada, Ryuta Masuya, Seiro Machigashira, Kazuhiko Nakame, Tatsuru Kaji, Satoshi Ieiri

    Pediatric surgery international   33 ( 10 )   1103 - 1108   2017年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    PURPOSE: We compared the characteristics and precision of right and left needle driving for right-handed pediatric surgeons using a laparoscopic diaphragmatic repair model. METHODS: Eighteen right-handed pediatric surgeons performed three needle driving maneuvers using both hands. We evaluated the required time and conducted an image analysis. The total path length, velocity, and acceleration of the needle driving were also evaluated. RESULTS: Obtained results show the findings for the required time (s, Rt 310.78 ± 148.93 vs. Lt 308.61 ± 122.53, p = 0.93), sum of needle driving balances (mm, Rt 5.23 ± 2.44 vs. Lt 5.05 ± 3.17, p = 0.83), the gap of the needle driving interval (Rt 1.2 ± 0.93 vs. Lt 2.17 ± 1.67, p = 0.04), total path length (mm, Rt 594.03 ± 205.29 vs. Lt 1641.07 ± 670.68, p < 0.01), and average velocity (mm/s, Rt 1.92 ± 0.54 vs. Lt 5.3 ± 1.39, p < 0.01). CONCLUSION: For right-handed pediatric surgeons, left needle driving showed almost same quality of right needle driving as regarding the precision. But left needle driving also showed too fast but not economical movement unfortunately, implying rough and risky forceps manipulation. Non-dominant hand training is necessary to avoid organ injury.

    DOI: 10.1007/s00383-017-4144-x

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  • 【急性胆道炎ガイドラインの位置づけと周術期感染対策への適応】Tokyo Guidelines 2013により設定されたbundleの急性胆嚢炎診断・治療における効果の検討

    岡本 好司, 木戸川 秀生, 野口 純也, 山吉 隆友, 松本 彩, 久永 真, 小山 正三朗, 桝屋 隆太, 新山 新, 田口 健蔵, 井上 征雄, 澤田 貴裕, 伊藤 重彦

    日本外科感染症学会雑誌   11 ( 3 )   211 - 215   2014年6月

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    記述言語:日本語   出版者・発行元:(一社)日本外科感染症学会  

    本邦発の国際的な急性胆管炎・胆嚢炎診療ガイドラインであるTG13では、診療上遵守されるべき項目をまとめて表示するbundleが設定された。bundle設定前と設定後で当院での急性胆嚢炎の診療の変化、成績とその妥当性を検討した。当院で2009年1月から2013年12月までに経験した急性胆嚢炎143例をbundle設定前110例、後33例の2群にわけ、bundleの各項目(1~11)の遵守率を確認し、bundle設定前後での診療成績を検討した。両群間の背景の性別、年齢、重症度等に差は認めなかった。bundle全体の遵守率は、設定後の群で有意に高かった。各項目間ごとの遵守率の比較では、項目番号5(Grade I(軽症)症例の発症から72時間以内の胆嚢摘出術を検討)、項目番号6(軽症例の24時間後の治療)と9(血液と胆汁の培養検査)で、設定前群の遵守率が低かった。治療結果では、死亡例は両群間ともなかったが、設定後群で有意に入院日数が短縮された。手術施行例の術後合併症の頻度も両群間に有意な差は認めなかった。急性胆嚢炎の診療において設定されたTG13でのbundle設定は、各主治医がガイドラインを参照してbundleの項目ごとに遵守しようとの意識の向上をもたらし、bundleの遵守率が高くなり、結果的に治療効果が高まる可能性がある。単施設での検討は症例数の限界があり、多施設での手術実施時期等の前向き臨床試験の実施が望まれる。(著者抄録)

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  • 鈍的胸部外傷症例の検討 多発外傷を中心に

    山吉 隆友, 岡本 好司, 井上 征雄, 渋谷 亜矢子, 馬場 雅之, 久永 真, 松本 彩, 桝屋 隆太, 田口 健蔵, 野口 純也, 木戸川 秀生, 伊藤 重彦

    日本救命医療学会雑誌   27   9 - 14   2013年9月

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    記述言語:日本語   出版者・発行元:日本救命医療学会  

    【目的】鈍的胸部外傷における多発外傷症例について検討した。【対象と方法】過去12年間の鈍的胸部外傷入院228例中、解剖学的重症度(Abbrebiated Injury Score:AIS)3以上の症例は137例であった。このうち他部位にAIS3以上の損傷を伴う多発外傷は30例(21.9%)で、これらを対象とし胸部の単独外傷107例(78.1%)と比較しながら受傷機転・損傷形態・治療・予後を検討した。【結果】男性18例、女性12例、平均年齢50.4歳(18-79歳)で単独外傷と差を認めず、受傷機転では挟圧が有意に高頻度であった。損傷形態は血胸・血気胸20例、気胸5例、肺挫傷3例、多発肋骨骨折2例で差を認めなかった。胸部以外の損傷部位は頭部15例、四肢9例、腹部8例、骨盤3例(重複を含む)であった。AIS平均3.73、多発外傷重症度スコア(Injury Severity Score:ISS)平均30.67で共に多発外傷で高値であった。治療は胸腔ドレナージ20例、保存的観察6例、手術4例、治療内容に差は認めなかったが多発外傷の手術症例は全例緊急手術で単独外傷より有意に高頻度であった。合併損傷を伴うIII型横隔膜破裂が3例で縫合閉鎖に加え損傷部の治療(脾摘1例、胃縫合閉鎖1例、腎止血及び開頭減圧1例)を、1例は胸壁出血に対する開胸止血と外傷性クモ膜下出血の保存的治療を行った。死亡例は4例で損傷部の出血制御不可3例(後腹膜、腎臓、胸腔内+頭蓋内)と脳挫傷1例であった。死亡率は13.3%で単独外傷に比し有意に上昇した。【考察】鈍的胸部外傷ではドレナージや経過観察で軽快する症例も多いが、多発外傷の場合単独外傷に比し受傷直後の緊急手術の頻度が増すこと、死亡率が上昇し他部位損傷が死亡原因の多くを占めることもあり、診療中は常に全身に対する検索を怠らず正確で迅速な診断と処置を心がける必要がある。(著者抄録)

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  • 先天性空腸狭窄症の臨床像に関する検討

    大西 峻, 向井 基, 加治 建, 下野 隆一, 中目 和彦, 桝屋 隆太, 野村 美緒子, 春松 敏夫, 松藤 凡

    日本小児外科学会雑誌   49 ( 2 )   195 - 200   2013年4月

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    記述言語:日本語   出版者・発行元:(一社)日本小児外科学会  

    【目的】先天性空腸狭窄症は比較的稀な疾患で腸閉鎖・狭窄症の約5%をしめる。集計報告はみられず自験例および報告例を集計しその臨床像を明らかにする。【対象と方法】診療録をもとに自験例4例の周産期情報、臨床経過を集計した。また自験例と報告例16例の新生児期症状、診断時年齢、初発症状、狭窄部位、狭窄様式、診断方法、治療法を集計した。【結果】自験例4例の結果:1例の出生前超音波検査で腸管拡張を認めたが、それ以外の周産期異常はなかった。診断時年齢は、月齢0~月齢7で、新生児期に診断された症例は1例のみであった。診断時体重は2,794g(-2.8SD)、6,685g(-1.5SD)、2,970g(-3.6SD)、5,868g(-2.1SD)であった。全例で嘔吐と体重増加不良を認めた。上部消化管造影で診断がなされ全例で手術が行われた。1例では術後狭窄に対してバルーン拡張が行われた。報告例を含めた20例の結果:記載のある全例が上部空腸の狭窄であり、大半が膜様狭窄であった。新生児期より嘔吐を認めた10例中3例のみが新生児期に診断された。11例は乳幼児期に嘔吐・腹部膨満・体重増加不良を契機に精査が行われ診断に至っていた。上部消化管造影は13例に行われ、このうち2例は十二指腸造影も行われた。1例は、シネMR撮像法で診断されていた。治療は1例で内視鏡的治療が施行された。記載のある13例で手術が施行され重篤な合併症の報告はなかった。【結論】空腸狭窄は先天異常であるが新生児期に診断される症例は少ない。乳児期に繰り返す嘔吐や体重増加不良を認めた場合は、本症も念頭に置き上部消化管造影や十二指腸造影検査を行う必要がある。(著者抄録)

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  • 急性虫垂炎の術前超音波検査での糞石像の臨床的意義について

    吉元 和彦, 鎌形 正一郎, 猪股 裕紀洋, 広部 誠一, 東間 未来, 小森 広嗣, 桝屋 隆太

    日本小児外科学会雑誌   48 ( 6 )   914 - 918   2012年10月

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    記述言語:日本語   出版者・発行元:(一社)日本小児外科学会  

    【目的】急性虫垂炎の術前超音波検査における糞石像の、手術適応や保存的治療後の再発などにおける臨床的意義について検討する。【対象と方法】2005年1月から2010年2月の間に急性虫垂炎と診断された15歳以下の小児のうち、初発で、超音波検査による治療方針の決定がなされ、かつ糞石像の有無の記載があった219人を対象とした。手術適応は、糞石の有無とは独立して過去の報告に記載されている超音波検査での診断基準により決定した。手術例については病理所見、非手術例については入院後の転帰、退院後の再発について後方視的に検討し、術前超音波検査での糞石像の有無が手術適応・手術時病理所見や再発の有無などにどの程度影響しているかを明らかにした。【結果】腹部超音波で糞石像あり群の83%(74/89)を手術適応と診断し、そのうち81%(60/74)を病理診断で壊疽性と診断した。一方、糞石像なし群では42%(54/130)が手術適応と診断され、67%(36/54)が壊疽性であった。また、糞石の有無に関わらず、超音波検査で手術適応でないと診断された群は、保存的に治癒し退院した。退院後再発率に両群間で有意差はなかった。【結論】腹部超音波検査での糞石像陽性例は手術適応となる可能性が糞石像陰性例より高く、糞石像を認めれば手術適応である可能性は高いと言えた。しかし、糞石像ありでも保存的に治癒する例もあり、また再発率にも差はないことから、糞石像のみで手術適応とすることは避けるべきであると考える。(著者抄録)

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    その他リンク: https://search.jamas.or.jp/default/link?pub_year=2012&ichushi_jid=J01113&link_issn=&doc_id=20121023170047&doc_link_id=%2Fes5shoge%2F2012%2F004806%2F001%2F0914-0918%26dl%3D0&url=https%3A%2F%2Fwww.medicalonline.jp%2Fjamas.php%3FGoodsID%3D%2Fes5shoge%2F2012%2F004806%2F001%2F0914-0918%26dl%3D0&type=MedicalOnline&icon=https%3A%2F%2Fjk04.jamas.or.jp%2Ficon%2F00004_2.gif

  • 臍ヘルニアに対する臍形成術の治療成績

    坂本 好昭, 広部 誠一, 東間 未来, 小森 広嗣, 吉元 和彦, 桝屋 隆太, 鎌形 正一郎, 林 奐

    日本小児外科学会雑誌   45 ( 7 )   1042 - 1048   2009年12月

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    記述言語:日本語   出版者・発行元:(一社)日本小児外科学会  

    【目的】当科で過去11年間に施行した臍ヘルニアに対する臍形成術について、我々の行っている臍形成術の有用性を含めた治療成績の検討を行った。【対象と方法】1998年1月より2008年12月までの11年間に当院で臍ヘルニアの手術を行った160例(男児94例、女児66例)を対象として、手術年齢、年間の手術件数、術後合併症、アンケート調査による満足度をretrospectiveに検討した。【結果】手術時期は6歳以下が全体の90%以上を占めた。また年間手術症例数は当初は10例ほどであったが、2004年以降、徐々に増加傾向であった。合併疾患としては鼠径ヘルニアが14例(8.75%)と最も多かった。術後合併症は創の発赤が23例(14.4%)と最多であり、ついで滲出液持続、皮下出血であった。創感染は8例(5.0%)、創離開は6例(3.8%)であった。また患者家族にアンケートを行い、89名からの回答を得た。患者家族が理想と思う臍形態は縦型(76.4%、p<0.001)であり、我々の術式による満足度調査では、74.2%(p<0.001)が満足と回答した。【結論】臍形成は機能面よりも美容面の評価が重要であり、患者やその家族の評価が非常に重要である。今回の検討により臍に対する美容意識が上昇していることと、我々が行ってきた術式は満足度の高いものであるということが判明した。一方で突出が強く余剰皮膚の多い症例では皮膚切除が必要であることが示唆された。(著者抄録)

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    その他リンク: https://search.jamas.or.jp/default/link?pub_year=2009&ichushi_jid=J01113&link_issn=&doc_id=20100208100002&doc_link_id=%2Fes5shoge%2F2009%2F004507%2F002%2F1042-1048%26dl%3D0&url=https%3A%2F%2Fwww.medicalonline.jp%2Fjamas.php%3FGoodsID%3D%2Fes5shoge%2F2009%2F004507%2F002%2F1042-1048%26dl%3D0&type=MedicalOnline&icon=https%3A%2F%2Fjk04.jamas.or.jp%2Ficon%2F00004_2.gif

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書籍等出版物

  • スタンダード小児内視鏡外科手術 : 押さえておきたい手技のポイント

    山高, 篤行, 内田, 広夫, 家入, 里志, 田口, 智章, 奥山, 宏臣, 中目和彦, 桝屋隆太( 担当: 分担執筆 範囲: ロボット手術)

    メジカルビュー社  2020年5月  ( ISBN:9784758304672

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    総ページ数:419p   担当ページ:pp64-66   記述言語:日本語   著書種別:学術書

    CiNii Books

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  • Hirschsprung’s Disease and the Allied Disorders

    Tomoaki Taguchi, Hiroshi Matsufuji, Satoshi Ieiri, Motoi Mukai, Koji Yamada, Masakazu Murakami, Ryuta Masuya( 担当: 分担執筆 範囲: Soave’s Procedure)

    Springer  2019年1月  ( ISBN:9789811336065, 9789811336058

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    担当ページ:pp131-135   記述言語:英語   著書種別:学術書

    Soave described his new technique as endorectal pull-through for Hirschsprung’s disease (HD) in 1963 [1, 2]. Endorectcal pull-through is one of three major procedures of definitive operation for HD. The remaining two are Duhamel procedure and Swenson procedure. Endorectcal pull-through consisted in removing the mucosa and submucosa of the rectum and pulling ganglionic intestine through the aganglionic muscular cuff. He introduced a basic concept of this operation from that of imperforated anus. In 1955 Romualdi reported on the treatment of high imperforate anus by the removal of the mucous membrane of the rectum down to the fistula and pull-through of the malformed rectal canal deprived of its epithelium [3]. Soave thought that Romualdi’s technique could be applied in the treatment of HD.

    DOI: 10.1007/978-981-13-3606-5_20

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MISC

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講演・口頭発表等

  • Morphometrical analyses on the narrowing of portal veins and thickening of media of hepatic arteries in the liver of biliary atresia. 国際会議

    Masuya R, Muraji T, Ohtani H, Mukai M, Onishi S, Harumatsu T, Yamada K, Yamada W, Kawano T, Machigashira S, Nakame K, Kaji T, Ieiri S

    The 25th Congress of the Asian Association of Pediatric Surgeons  2018年12月 

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    会議種別:口頭発表(一般)  

    開催地:Dubai   国名:アラブ首長国連邦  

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  • Circulating Maternal Chimeric Cells Have An Impact On The Outcome Of Biliary Atresia. 国際共著 国際会議

    Masuya R, Muraji T, Kanaan SB, Harumatsu T, Mutoh M, Toma M, Yanai T, Stevens A, Nelson JL, Nanashima A, Ieiri S

    35th International Symposium on Pediatric Surgical Research  2022年10月 

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    会議種別:シンポジウム・ワークショップ パネル(公募)  

    開催地:Osaka   国名:日本国  

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  • Clinical Outcome and Neurological development of Patients with Biliary Atresia Associated with Bleeding Tendency: a Single Institution Experience 国際会議

    Masuya R, Muraji T, Harumatsu T, Machigashira S, Murakami M, Sugita K, Yano K, Onishi S, Yamada K, Yamada W, Kawano T, Muto M, Nakame K, Kaji T, Nanashima A, Ieiri S

    The 26th Congress Of The Asian Association Of Pediatric Surgeons  2022年11月 

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    会議種別:ポスター発表  

    国名:アメリカ合衆国  

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  • The physical growth and social prognosis of esophageal atresia patients who reach 15 years of age or older: The long-term outcomes at a single institution 国際会議

    Masuya R, Kaji T, Murakami M, Yano K, Baba T, Harumatsu T, Onishi S, Yamada K, Yamada W, Kawano T, Machigashira S, Mukai M, Nakame K, Mukai M, Ieiri S

    The 25th Congress of the Asian Association of Pediatric Surgeons  2018年12月 

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    会議種別:口頭発表(一般)  

    開催地:Dubai   国名:アラブ首長国連邦  

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  • Predictive factors affecting the prognosis and late complications of 73 consecutive cases of esophageal atresia in 2 centers of Kagoshima Prefecture over 30 years. 国際会議

    Masuya R, Nakame K, Moriguchi T, Sugita K, Onishi S, Yamada K, Yamada W, Kawano T, Machigashira S, Mukai M, Kaji T, Goto M, Suzuhigashi M, Noguchi H, Ieiri S

    The 50th Annual Scientific Meeting of the Pacific Association of Pediatric Surgeons  2017年5月 

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    会議種別:口頭発表(一般)  

    開催地:Seattle   国名:アメリカ合衆国  

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  • Morphometrical analyses on narrowing of portal veins and thickening of hepatic arteries in liver of biliary atresia. 国際会議

    Masuya R, Muraji T, Ohtani H, Mukai M, Yano K, Kawano M, Onishi S, Yamada K, Yamada W, Kawano T, Machigashira S, Nakame K, Kaji T, Ieiri S

    The 51st Annual Scientific Meeting of the Pacific Association of Pediatric Surgeons  2018年5月 

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    会議種別:ポスター発表  

    開催地:Sapporo   国名:日本国  

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共同研究・競争的資金等の研究課題

  • 胆管上皮免疫応答を標的とした母親由来細胞キメリズムから解き明かす胆道閉鎖症の病因

    2024年4月 - 2027年3月

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    連 利博, 家入 里志, 大西 峻, 杉田 光士郎, 宮澤 正顯, 尾藤 祐子, 桝屋 隆太

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    配分額:4550000円 ( 直接経費:3500000円 、 間接経費:1050000円 )

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  • GVHD誘導マウスでのサイトカイン阻害による胆道閉鎖症の炎症標的型治療法の開発

    2023年4月 - 2026年3月

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    桝屋 隆太, 家入 里志, 大西 峻, 連 利博, 川野 孝文, 杉田 光士郎, 七島 篤志, 武藤 充, 中目 和彦, 春松 敏夫

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    配分額:4420000円 ( 直接経費:3400000円 、 間接経費:1020000円 )

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  • ワシントン大学・シアトル小児病院・小児外科学講座への留学助成

    2023年

    公益財団法人内視鏡医学研究振興財団  海外短期留学助成 

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    担当区分:研究代表者 

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  • 母親由来キメラ細胞の定量的解析による胆道閉鎖症の病因究明と予後予測研究

    2020年4月 - 2023年3月

    日本学術振興会  科学研究費助成事業  若手研究

    桝屋 隆太

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    配分額:4030000円 ( 直接経費:3100000円 、 間接経費:930000円 )

    胆道閉鎖症(Biliary atresia, 以下BA)は出生後に肝内・肝外胆管が不可逆的に閉塞し、黄疸、灰白色便、肝機能障害を呈する原因不明の疾患である。肝門部空腸吻合術によって多くの患児で黄疸消失、長期生存が得られるようになったが、進行する門脈圧亢進症や反復する胆管炎などのため、成人までに約半数が肝移植を必要とする難病である。
    BAの病因としてウイルス説や免疫異常説などが提唱されているが、発症のメカニズムはこれまで明らかにされていない。
    我々はBAの発症機序において、妊娠期間中に母親の細胞が経胎盤的に胎児に迷入し生着するMaternal microchimerismが関与するという仮説に基づき本研究を立案した。BA発症の有無あるいはBA患児の予後と、末梢血中の母親由来キメラ細胞の有無との相関について明らかにすることを目的として、BA患児および非BA同胞の末梢血中の母親由来細胞のDNAの定量を行った。
    研究協力施設において、BAに対し肝門部空腸吻合術を行い外来経過観察中の患児、母親、および非BAの同胞を対象とし、静脈血を用いてHLAアレルを同定することで、母親のHLAのうち児に遺伝していないもの(NIMA: non-inherited maternal antigen)を同定した。続いてBA患児・非BA同胞の静脈血を採取してBuffy Coatおよび血漿からDNAを抽出し、NIMAのDNAをリアルタイムPCRで定量することで、末梢血中に含まれる母親由来キメラ細胞の定量分析を行った。
    BA患児を予後良好群、予後不良群に分けて上記PCR結果について群間比較したところ、予後不良群においてBuffy Coat中に検出される母親由来細胞の数が有意に多い結果となった。

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  • 母親由来キメラ細胞による胆道閉鎖症の免疫学的病因解明と発症予防の可能性探索

    2019年

    公益財団法人川野小児奨学財団  若手枠研究助成 

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    担当区分:研究代表者 

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  • IFALDの病態解明に基づく大建中湯を用いた新規治療法の開発

    2018年4月 - 2021年3月

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    矢野 圭輔, 家入 里志, 大西 峻, 山田 和歌, 川野 孝文, 加治 建, 中目 和彦, 町頭 成郎, 向井 基, 山田 耕嗣, 桝屋 隆太, 春松 敏夫

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    配分額:4420000円 ( 直接経費:3400000円 、 間接経費:1020000円 )

    大量腸管切除と中心静脈カテーテル挿入を施したラットに14日間の絶食TPNを行い、大建中湯投与群とコントロール群に分けてIFALDの発症と予防効果を検討した。大建中湯の投与は、同モデルに対しては経口投与が困難であったため、代替方法として、同様の作用をもつ消化管ホルモンやその他ペプチドを頸静脈的に投与して、IFALDに対する予防効果を検討した。コントロール群ではIFALDの発症を認めたが、GLP-2投与群やHGF投与群において、IFALDの予防効果が確認できた。

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  • 胆道閉鎖症患児における,母親由来キメラ細胞の定量的分析による予後予測

    2018年1月 - 2018年12月

    鹿児島県医師会  鹿児島県医師会医学研究助成 

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    担当区分:研究代表者 

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  • 腹腔鏡下肝管空腸吻合術に対する高精細画像システム(8K&3D)導入の臨床効果の検討 ―小児先天性胆道拡張症の細径胆管吻合に対する効果―

    2018年

    九州内視鏡下外科手術研究会  九州内視鏡下外科手術研究会研究奨励賞 

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    担当区分:研究代表者 

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  • 壊死性腸炎に対するグレリンを用いた発症メカニズム解明と革新的新規予防治療法の開発

    2017年4月 - 2020年3月

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    町頭 成郎, 家入 里志, 大西 峻, 山田 和歌, 川野 孝文, 加治 建, 武藤 充, 中目 和彦, 向井 基, 桝屋 隆太, 矢野 圭輔

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    配分額:4550000円 ( 直接経費:3500000円 、 間接経費:1050000円 )

    死亡率の高い新生児外科疾患である壊死性腸炎に対し、腸管における粘膜損傷予防や炎症抑制効果が報告されているグレリンを投与し新たな発症予防や治療法を探った。コントロール群である母乳群と低酸素環境とLPS刺激で誘導した壊死性腸炎モデルマウス群、壊死性腸炎モデルマウスにグレリンを投与した3群の比較を行った。
    グレリン投与群は壊死性腸炎群より回腸組織像において絨毛の萎縮が軽減し、粘膜下層と固有筋層の乖離が改善傾向であった。また回腸組織のNECスコアと炎症性サイトカイン発現が低い傾向を認めたが有意差は示せなかった。今後高用量のグレリン投与を追加検討することで壊死性腸炎に対する予防効果の証明が期待出来る。

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  • 救命困難な超重症NECに対する大建中湯を用いた実験的予防法開発

    2017年4月 - 2020年3月

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    桝屋 隆太, 家入 里志, 大西 峻, 川野 孝文, 加治 建, 武藤 充, 中目 和彦, 町頭 成郎, 矢野 圭輔

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    配分額:4420000円 ( 直接経費:3400000円 、 間接経費:1020000円 )

    新生児壊死性腸炎(以下NEC)モデルラットを改良して重症化し、それに対して大建中湯の投与量ごとに分類し投与プロトコールを決定した。その後実際に投与実験を行った。犠死後のラットから摘出した腸管を組織学的に解析し、NECの重症度と大建中湯投与量との関連性を評価した。また組織内の炎症性サイトカイン、核内蛋白を定量し、大建中湯投与量との相関を評価した。
    その結果、(1)大建中湯の投与は、組織学的評価に基づいてNECのグレードを低下させる傾向があり、(2)大建中湯の高用量(1.0g/kg/日)投与は、NECの発生率を有意に改善し、(3)IL-6陽性細胞の発生率を有意に低下させることが明らかになった。

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  • 母親由来キメラ細胞が引き起こす胆道閉鎖症の免疫学的病因解明と発症予防の可能性探索

    2017年4月 - 2020年3月

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    連 利博, 家入 里志, 大西 峻, 諸冨 嘉樹, 増本 幸二, 原 博満, 加治 建, 武藤 充, 桝屋 隆太, 堀池 正樹, 古川 泰三

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    配分額:4550000円 ( 直接経費:3500000円 、 間接経費:1050000円 )

    患者7例の母児間の混合リンパ球試験を行った。
    6例に母親の患児抗原刺激に対する反応は第三者による反応より様々な程度に小さかった。予後良好の1例は、寛容形成がなく、患児は母親に対して強く反応しており、母親Th1のエフェクターリンパ球を排除できると考えられた。今後の評価は、反応する細胞のphenotypeを確認と、患児末梢血に母親細胞が存在するかどうかである。
    予後が異なる2例で、患児の抗原刺激による母親の反応が第三者と同等な一組があった。異なる点は患児の母親抗原刺激の反応が予後不良例で第三者と同等に強い反応であったである。今後、抗原刺激で分化増殖する細胞のphenotype を見る必要がある.

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