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Internal Medicine (Tokyo, Japan)|December 16, 2021
A Gas-forming Liver Abscess with Massive Bleeding into the Abscess Cavity Due to a Ruptured Inferior Phrenic ArteryMari Satoh, Takayuki Kogure, Akinobu Koiwai, et al.
JGH Open : an Open Access Journal of Gastroenterology and Hepatology|January 25, 2021
Unusual imaging findings of pancreatobiliary-type intraductal papillary mucinous neoplasmAkinobu Koiwai, Morihisa Hirota, Atsuko Takasu, et al.
DEN Open|November 28, 2025
A Novel Technique of Overtube-assisted Ultrathin Endoscopic Biliary Drainage Using Multi-Hole Self-Expandable Metal Stents: A Case ReportAkinobu Koiwai, Morihisa Hirota, Kei Ishikawa, et al.
DEN Open|April 23, 2026
A Case of Refractory Peptic Ulcer with Choledochoduodenal Fistula Successfully Treated by Biliary Stent Placement Using an Ultrathin Endoscopic Rendezvous Technique: A Case ReportYuki Miyashita, Akinobu Koiwai, Eri Urita, et al.
Internal Medicine (Tokyo, Japan)|December 16, 2021
Hypereosinophilia with Hepatic Nodule Formation Caused by Ganoderma lucidumTakayuki Kogure, Akinobu Koiwai, Daisuke Fukushi, et al.
Case Reports in Gastroenterology|November 1, 2021
Nasopancreatic Drainage for 4 Patients during the Early Phase of Acute PancreatitisMorihisa Hirota, Akinobu Koiwai, Atsuko Takasu, et al.
DEN Open|August 4, 2025
Edoxaban-induced enterocolitis: The first case report demonstrating distinct endoscopic and histological featuresKatsuya Endo, Jun Yamada, Tomofumi Katayama, et al.
Surgical Case Reports|January 20, 2026
A Case of Multiple Metastases in the Gastric Wall Due to Needle Tract Seeding after Endoscopic Ultrasound-Guided Tissue Acquisition for Pancreatic Tail CancerKazuhiro Takami, Kei Nakagawa, Hiroto Sakurai, et al.
Case Reports in Gastroenterology|October 7, 2021
Immunoglobulin G4-Related Hepatic Inflammatory Pseudotumor Diagnosed with Endoscopic Ultrasound-Guided Fine-Needle BiopsyAkinobu Koiwai, Morihisa Hirota, Mari Satoh, et al.
JGH Open : an Open Access Journal of Gastroenterology and Hepatology|May 23, 2022
Self-expandable metal stents have longer patency and less cholangitis than inside stents in malignant perihilar biliary obstructionAkinobu Koiwai, Morihisa Hirota, Tomofumi Katayama, et al.
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