A case of portal venous gas after obstructive transverse colon cancer surgery by Yuichiro Furutani, Chikashi Hiranuma, Masakazu Hattori, Kenji Doden, Yasuo Hashizume

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Anorectal injury related to a personal watercraft: a case report and literature review by Kaoru Katano, Yuichiro Furutani, Chikashi Hiranuma, Masakazu Hattori, Kenji Doden, Yasuo Hashidume

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Adult sacrococcygeal teratoma excised by endoscopic surgery with a transsacral approach: a case report by Ryosuke Machi, Chikashi Hiranuma, Hayato Suzuki, Masakazu Hattori, Kenji Doden, Yasuo Hashidume

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