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Akinobu Koiwai

Observed names: A., Koiwai, Akinobu KOIWAI, 小岩井明信
ORCID: 0000-0002-7657-1913
Observed ORCID: 0000-0002-7657-1913
OpenAlex ID: A5000296171
Neutrophil Infiltration and Acinar-ductal Metaplasia Are the Main Pathological Findings in Pembrolizumab-induced Pancreatitis
2022 · Morihisa Hirota, Keigo Murakami, et al. · Internal Medicine · 17
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Postprocedure serum amylase or lipase levels predict postendoscopic retrograde cholangiopancreatography pancreatitis: Meta‐analysis of diagnostic test accuracy studies and utility assessment
2023 · Morihisa Hirota, Takao Itoi, et al. · Digestive Endoscopy · 13
Self‐expandable metal stents have longer patency and less cholangitis than inside stents in malignant perihilar biliary obstruction
2022 · Akinobu Koiwai, Morihisa Hirota, et al. · JGH Open · 10
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Diffuse pancreatic parenchymal atrophy, an imaging finding predictive of the development of pancreatic ductal adenocarcinoma: A case–control study
2023 · Akinobu Koiwai, Morihisa Hirota, et al. · JGH Open · 8
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Direct peroral cholangioscopy with red dichromatic imaging 3 detected the perihilar margin of superficial papillary extension in a patient with intraductal papillary neoplasm of the bile duct
2023 · Akinobu Koiwai, Morihisa Hirota, et al. · DEN Open · 7
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Observations on the presence of bile using red dichromatic imaging 3 in peroral cholangioscopy
2021 · Akinobu Koiwai, Morihisa Hirota, et al. · Digestive Endoscopy · 5
Presymptomatic Crohn's Disease in a Young Patient Diagnosed Just After the Onset of Idiopathic Acute Pancreatitis
2020 · Katsuya Endo, Morihisa Hirota, et al. · Internal Medicine · 4
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Edoxaban‐induced enterocolitis: The first case report demonstrating distinct endoscopic and histological features
2025 · Katsuya Endo, Jun Yamada, et al. · DEN Open · 3
A Gas-forming Liver Abscess with Massive Bleeding into the Abscess Cavity Due to a Ruptured Inferior Phrenic Artery
2021 · Mari Satoh, Takayuki Kogure, et al. · Internal Medicine · 3
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Hypereosinophilia with Hepatic Nodule Formation Caused by Ganoderma lucidum
2021 · Takayuki Kogure, Akinobu Koiwai, et al. · Internal Medicine · 2
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Immunoglobulin G4-Related Hepatic Inflammatory Pseudotumor Diagnosed with Endoscopic Ultrasound-Guided Fine-Needle Biopsy
2021 · Akinobu Koiwai, Morihisa Hirota, et al. · Case Reports in Gastroenterology · 2
A Biliary Mucinous Cystic Neoplasm with Intrahepatic and Lymph Node Metastases
2020 · Akinobu Koiwai, Takayuki Kogure, et al. · Internal Medicine · 2
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Simultaneous Placement of Three Thin‐Delivery Multi‐Hole Self‐Expandable Metallic Stents for Malignant Hilar Biliary Obstruction Using a Large‐Channel Duodenoscope
2026 · Akinobu Koiwai, Morihisa Hirota, et al. · DEN Open · 1
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Nasopancreatic Drainage for 4 Patients during the Early Phase of Acute Pancreatitis
2021 · Morihisa Hirota, Akinobu Koiwai, et al. · Case Reports in Gastroenterology · 1
Unusual imaging findings of pancreatobiliary‐type intraductal papillary mucinous neoplasm
2020 · Akinobu Koiwai, Morihisa Hirota, et al. · JGH Open · 1
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Clinical Outcomes of Multi‐Hole Covered Self‐Expandable Metal Stents for Malignant Distal Biliary Obstruction: A Retrospective Comparative Study With an Exploratory Evaluation of 6‐mm Devices
2026 · Akinobu Koiwai, Yuki Miyashita, et al. · DEN Open
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A novel endoscopic plastic stent exchange technique using a loop cutter in malignant afferent loop obstruction: a method applicable to various pancreatobiliary situations
2026 · Akinobu Koiwai, Morihisa Hirota, et al. · Endoscopy
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A Case of Refractory Peptic Ulcer with Choledochoduodenal Fistula Successfully Treated by Biliary Stent Placement Using an Ultrathin Endoscopic Rendezvous Technique: A Case Report
2026 · Yuki Miyashita, Akinobu Koiwai, et al. · DEN Open
Obstructive jaundice caused by a giant common hepatic artery aneurysm
2026 · Akinobu Koiwai, Morihisa Hirota, et al. · Clinical Endoscopy
Transpapillary Penetration of an Ampullary Tumor by a Migrated ERBD Tube
2026 · Akinobu Koiwai, Morihisa Hirota, et al. · ACG Case Reports Journal
Rare complication of plastic endoscopic retrograde biliary drainage stent placement: bile duct perforation
2026 · Akinobu Koiwai, Morihisa Hirota, et al. · Clinical Endoscopy
A Case of Multiple Metastases in the Gastric Wall Due to Needle Tract Seeding after Endoscopic Ultrasound-Guided Tissue Acquisition for Pancreatic Tail Cancer
2026 · Kazuhiro Takami, Kei Nakagawa, et al. · Surgical Case Reports
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Applying Artificial Intelligence Technologies to Detect Pancreatic Ductal Adenocarcinoma Using Routine Laboratory Tests: A Pilot Study with the Aid of Machine Learning Suitable for a Small Data Analysis
2026 · Akinobu Koiwai, Morihisa Hirota, et al. · Internal Medicine
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A Novel Technique of Overtube‐assisted Ultrathin Endoscopic Biliary Drainage Using Multi‐Hole Self‐Expandable Metal Stents: A Case Report
2025 · Akinobu Koiwai, Morihisa Hirota, et al. · DEN Open
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Advances in new biomarkers for early diagnosis of pancreatic cancer
2024 · Akinobu KOIWAI, Morihisa HIROTA, et al. · Suizo
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Works count: 31
Citation count: 79
H-index: 5
I10-index: 3
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