Hiroaki Kumazawa

A rare case of obstructive shock caused by a giant biloma with right heart compression in a patient undergoing hemodialysis.

Journal: CEN case reports

Published: December 25, 2025

Double-layered suturing using a reopenable-clip over-the-line method with a 20-mm reopenable clip to close a large gastric mucosal defect.

Journal: Endoscopy

Published: November 28, 2025

Duodenal endoscopic submucosal dissection using dual-channel rapid hemostasis for a large tumor involving the papilla.

Journal: Endoscopy

Published: October 13, 2025

A novel traction method for underwater colorectal endoscopic submucosal dissection: reopenable clip-over-the-line traction.

Journal: Endoscopy

Published: July 29, 2025

Defect closure after duodenal endoscopic submucosal dissection for a tumor of the minor papilla in a patient with pancreas divisum: reopenable-clip over-the-line method.

Journal: Endoscopy

Published: July 10, 2025

Shallow endoscopic submucosal dissection using a gas-free immersion system to prevent strictures after esophageal dissections.

Journal: Endoscopy

Published: June 18, 2025

Gastric defect closure with reopenable clip over-the-line method and dual-action tissue clip for 3-point fixation.

Journal: Endoscopy

Published: December 10, 2024

Potential hazards of gas generation during underwater endoscopic submucosal dissection.

Journal: Endoscopy

Published: October 14, 2024

Direct‑acting antiviral treatment is safe and effective for chronic HCV patients with psychiatric disorders.

Journal: Experimental and therapeutic medicine

Published: January 09, 2023

Gastric Foveolar-type Adenocarcinoma with Raspberry-like Appearance in a Helicobacter pylori-uninfected Stomach: A Long-term Retrospective Follow-up of 16 Years.

Journal: Internal medicine (Tokyo, Japan)

Published: December 08, 2022

A rare case of obstructive shock caused by a giant biloma with right heart compression in a patient undergoing hemodialysis.

A rare case of obstructive shock caused by a giant biloma with right heart compression in a patient undergoing hemodialysis.

Double-layered suturing using a reopenable-clip over-the-line method with a 20-mm reopenable clip to close a large gastric mucosal defect.

Double-layered suturing using a reopenable-clip over-the-line method with a 20-mm reopenable clip to close a large gastric mucosal defect.

Duodenal endoscopic submucosal dissection using dual-channel rapid hemostasis for a large tumor involving the papilla.

Duodenal endoscopic submucosal dissection using dual-channel rapid hemostasis for a large tumor involving the papilla.

A novel traction method for underwater colorectal endoscopic submucosal dissection: reopenable clip-over-the-line traction.

A novel traction method for underwater colorectal endoscopic submucosal dissection: reopenable clip-over-the-line traction.

Defect closure after duodenal endoscopic submucosal dissection for a tumor of the minor papilla in a patient with pancreas divisum: reopenable-clip over-the-line method.

Defect closure after duodenal endoscopic submucosal dissection for a tumor of the minor papilla in a patient with pancreas divisum: reopenable-clip over-the-line method.

Shallow endoscopic submucosal dissection using a gas-free immersion system to prevent strictures after esophageal dissections.

Shallow endoscopic submucosal dissection using a gas-free immersion system to prevent strictures after esophageal dissections.

Gastric defect closure with reopenable clip over-the-line method and dual-action tissue clip for 3-point fixation.

Gastric defect closure with reopenable clip over-the-line method and dual-action tissue clip for 3-point fixation.

Potential hazards of gas generation during underwater endoscopic submucosal dissection.

Potential hazards of gas generation during underwater endoscopic submucosal dissection.

Direct‑acting antiviral treatment is safe and effective for chronic HCV patients with psychiatric disorders.

Direct‑acting antiviral treatment is safe and effective for chronic HCV patients with psychiatric disorders.

Gastric Foveolar-type Adenocarcinoma with Raspberry-like Appearance in a Helicobacter pylori-uninfected Stomach: A Long-term Retrospective Follow-up of 16 Years.

Gastric Foveolar-type Adenocarcinoma with Raspberry-like Appearance in a Helicobacter pylori-uninfected Stomach: A Long-term Retrospective Follow-up of 16 Years.

A Novel Scoring System to Improve the Detection Efficiency of Pancreatic Cystic Lesions in the General Population.

A Novel Scoring System to Improve the Detection Efficiency of Pancreatic Cystic Lesions in the General Population.

Ischemic hepatitis with infectious endocarditis: A case report.

Ischemic hepatitis with infectious endocarditis: A case report.