Successful management of pyriform sinus cyst and fistula using endoscopic electrocauterization by Naonori Kawakubo, Satoshi Obata, Koichiro Yoshimaru, Kina Miyoshi, Tomoko Izaki, Tatsuro Tajiri

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Massive bleeding from a duodenal ulcer in a child with influenza infection: A case report of endoscopic findings by Kenta Ishimoto, Koichiro Yoshimaru, Yasuyuki Uchida, Keisuke Kajihara, Satoshi Obata, Toshiharu Matsuura, Tatsuro Tajiri

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Biliary atresia in a preterm and extremely low birth weight infant: a case report and literature review by Yuki Kawano, Koichiro Yoshimaru, Yasuyuki Uchida, Keisuke Kajihara, Yukihiro Toriigahara, Takeshi Shirai, Yoshiaki Takahashi, Toshiharu Matsuura

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COVID19 detection in appendix of acute appendicitis in a child: a case report and review of literature by Jun Kono, Koichiro Yoshimaru, Toshiharu Matsuura, Akihiko Tamaki, Junkichi Takemoto, Shinya Matsumoto, Taeko Hotta, Kenichi Kohashi, Yoshinao Oda, Tatsuro Tajiri

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