Publications by authors named "Yuhei Iwasa"

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Factors Affecting Clinical Course of Postoperative Bile Leakage and Efficacy of Endoscopic Biliary Drainage: A Multi-Center Retrospective Cohort Study.
Kota Shimojo, Takuji Iwashita, Keisuke Iwata, Yuki Utakata, Kaori Koide, Yuhei Iwasa

DEN Open· April 2026

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Encapsulation levels rather than elapsed time after the onset of acute pancreatitis are related to clinical outcomes of pancreatic walled-off necrosis.
Akinori Maruta, Takuji Iwashita, Tomotaka Saito, Wataru Gonoi, Kensaku Yoshida, Yuhei Iwasa

Endoscopy· December 2025

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Reply to Ancil et al.
Akinori Maruta, Takuji Iwashita, Tomotaka Saito, Wataru Gonoi, Kensaku Yoshida, Yuhei Iwasa

Endoscopy· December 2025

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Three cases in which plasmapheresis was effective for persistent obstructive jaundice due to malignant biliary obstruction after biliary drainage.
Yuhei Iwasa, Keisuke Iwata, Ryuichi Tezuka, Takuji Iwashita, Shinya Uemura

Clin J Gastroenterol· October 2025

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High vs. Low Initial Steroid Dose in Autoimmune Pancreatitis: Multicenter Cohort Study on Efficacy and Diabetes Worsening.
Yuhei Iwasa, Takuji Iwashita, Keisuke Iwata, Ryuichi Tezuka, Shinya Uemura

Diagnostics (Basel)· October 2025

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Three-dimensional volume estimates of pancreatic fluid collections in relation to clinical outcomes of EUS-guided treatment.
Montinee Supchatura, Tomotaka Saito, Atsuhiro Masuda, Arata Sakai, Masahiro Tsujimae, Yuhei Iwasa

Gastrointest Endosc· August 2025

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Quadrant, necrosis, and infection criteria for the risk stratification of walled-off necrosis: external validation using multi-institutional data.
Hideyuki Shiomi, Tomotaka Saito, Tsuyoshi Hamada, Ryota Nakano, Shunsuke Omoto, Yuhei Iwasa

Gastrointest Endosc· July 2025

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19-Gauge Versus 22-Gauge Franseen Needles, Comparison of the Histological Diagnostic Capability of Endoscopic Ultrasound-Guided Fine-Needle Biopsy for Autoimmune Pancreatitis: A Multicenter Retrospective Cohort Study.
Shota Iwata, Takuji Iwashita, Yosuke Ohashi, Akihiko Senju, Ryuichi Tezuka, Yuhei Iwasa

Diagnostics (Basel)· June 2025

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Comparison of the preoperative transpapillary unilateral biliary drainage methods for the future remnant liver in patients with hilar cholangiocarcinoma with liver resection: a retrospective cross-sectional study.
Mitsuru Okuno, Keisuke Iwata, Takuji Iwashita, Tsuyoshi Mukai, Kota Shimojo, Yuhei Iwasa

J Gastrointest Surg· May 2025

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[Intravenous glucose infusion may have caused refeeding syndrome in a patient with advanced amyotrophic lateral sclerosis].
Naoki Yamahara, Nobuaki Yoshikura, Iwasa Yuhei, Takayoshi Shimohata

Rinsho Shinkeigaku· May 2025

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Evaluating optimal bilateral biliary stenting in endoscopic reintervention after initial plastic stent dysfunction for unresectable malignant hilar biliary obstruction: Retrospective cross-sectional study.
Mitsuru Okuno, Keisuke Iwata, Takuji Iwashita, Tsuyoshi Mukai, Kota Shimojo, Yuhei Iwasa

Dig Endosc· October 2024

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Safety and Efficacy of Covered Self-Expandable Metallic Stent for Choledochojejunal Anastomotic Stricture: A Multi-Center Retrospective Cohort Study.
Yuhei Iwasa, Takuji Iwashita, Keisuke Iwata, Mitsuru Okuno, Kota Shimojo

Dig Dis Sci· September 2024

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Diagnosis of pancreatic malignancies using an overnight-stored pancreatic juice cell block specimen.
Mitsuru Okuno, Takuji Tanaka, Keisuke Iwata, Tsuyoshi Mukai, Naoki Watanabe, Yuhei Iwasa

Pancreatology· August 2024

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A phase-I study of second-line S-IROX for unresectable pancreatic cancer after gemcitabine plus nab-paclitaxel failure.
Mitsuru Okuno, Tsuyoshi Mukai, Keisuke Iwata, Akihiro Takagi, Yuki Ito, Yuhei Iwasa

Med Oncol· July 2024

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One-stage versus two-stage endoscopic management for acute cholangitis caused by common bile duct stones: A retrospective multicenter cohort study.
Akinori Maruta, Takuji Iwashita, Kensaku Yoshida, Yuhei Iwasa, Mitsuru Okuno

J Hepatobiliary Pancreat Sci· June 2024

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Comparison of 19-gauge conventional and Franseen needles for the diagnosis of lymphadenopathy and classification of malignant lymphoma using endoscopic ultrasound fine-needle aspiration.
Mitsuru Okuno, Keisuke Iwata, Tsuyoshi Mukai, Yusuke Kito, Takuji Tanaka, Yuhei Iwasa

Clin Endosc· May 2024

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Possibility of Cell Block Specimens from Overnight-Stored Bile for Next-Generation Sequencing of Cholangiocarcinoma.
Mitsuru Okuno, Tomohiro Kanayama, Keisuke Iwata, Takuji Tanaka, Hiroyuki Tomita, Yuhei Iwasa

Cells· May 2024

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Gastric Varices Rupture due to Splenic Vein Obstruction Associated with Autoimmune Pancreatitis.
Yuhei Iwasa, Keisuke Iwata, Mitsuru Okuno, Takuji Iwashita, Shinya Uemura

Intern Med· April 2024

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Comparison of unilateral and bilateral intraductal plastic stent placement for unresectable malignant hilar biliary obstruction: A propensity score-matched cohort analysis.
Mitsuru Okuno, Keisuke Iwata, Tsuyoshi Mukai, Yuhei Iwasa, Shinya Uemura

J Hepatobiliary Pancreat Sci· April 2024

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Peroral Pancreatoscopy-Guided Lithotripsy Compared with Extracorporeal Shock Wave Lithotripsy in the Management of Pancreatic Duct Stones in Chronic Pancreatitis: A Multicenter Retrospective Cohort Study.
Keisuke Iwata, Takuji Iwashita, Tsuyoshi Mukai, Yuhei Iwasa, Mitsuru Okuno

Diagnostics (Basel)· April 2024

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Pancreatic Metastases from Renal Cell Carcinoma Showing Atypical Imaging Findings.
Yosuke Ohashi, Keisuke Iwata, Tsuyoshi Mukai, Yuhei Iwasa, Mitsuru Okuno

Intern Med· January 2024

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Utility of bilateral intraductal plastic stent for malignant hilar biliary obstruction compared with bilateral self-expandable metal stent: a propensity score-matched cohort analysis.
Mitsuru Okuno, Keisuke Iwata, Takuji Iwashita, Tsuyoshi Mukai, Kota Shimojo, Yuhei Iwasa

Gastrointest Endosc· November 2023

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The evaluation of bilateral stenting using braided or laser-cut self-expandable metallic stent for malignant hilar biliary obstruction.
Mitsuru Okuno, Keisuke Iwata, Tsuyoshi Mukai, Yosuke Ohashi, Shota Iwata, Yuhei Iwasa

Surg Endosc· November 2023

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The Usefulness and Reliability of Coagrasper for Artery Bleeding during Endoscopic Necrosectomy.
Yuki Ito, Mitsuru Okuno, Keisuke Iwata, Masahiro Kawade, Yuhei Iwasa

Medicina (Kaunas)· October 2023

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Long- and short-term outcomes of balloon dilation for benign choledochojejunal anastomotic stricture using balloon endoscopy-assisted ERCP: a multi-center retrospective cohort study.
Yuhei Iwasa, Takuji Iwashita, Keisuke Iwata, Shinya Uemura, Mitsuru Okuno

BMC Gastroenterol· June 2023

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