Hiroya Ueyama

Tokyo, Japan

Last Updated: 09/26/2026

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Found 125 publications

Sex and age differences in upper abdominal symptoms in patients without organic disease.

Sex and age differences in upper abdominal symptoms in patients without organic disease.

Journal: Scandinavian journal of gastroenterology

Published: August 03, 2026

Response to the Commentary on Akazawa et al.

Response to the Commentary on Akazawa et al.

Journal: Journal of gastroenterology and hepatology

Published: February 03, 2026

Immediate discontinuation versus gradual tapering of proton pump inhibitors in long-term users: a randomized controlled trial.

Immediate discontinuation versus gradual tapering of proton pump inhibitors in long-term users: a randomized controlled trial.

Journal: Journal of gastroenterology

Published: January 31, 2026

Texture and Color Enhancement Imaging for the Kyoto Classification of Gastritis: Evaluation of Visibility and Color Differences.

Texture and Color Enhancement Imaging for the Kyoto Classification of Gastritis: Evaluation of Visibility and Color Differences.

Journal: DEN open

Published: October 27, 2025

Gastric Epithelial Neoplasms in Helicobacter pylori-Uninfected Patients.

Gastric Epithelial Neoplasms in Helicobacter pylori-Uninfected Patients.

Journal: Digestion

Published: October 09, 2025

Clinico-epidemiological Characteristics of Helicobacter pylori-naïve Undifferentiated Gastric Cancer.

Clinico-epidemiological Characteristics of Helicobacter pylori-naïve Undifferentiated Gastric Cancer.

Journal: Internal medicine (Tokyo, Japan)

Published: August 27, 2025

Clinical Features of Invasive Gastric Cancer Developed After Helicobacter pylori Eradication During Regular Endoscopic Surveillance.

Clinical Features of Invasive Gastric Cancer Developed After Helicobacter pylori Eradication During Regular Endoscopic Surveillance.

Journal: Digestive endoscopy : official journal of the Japan Gastroenterological Endoscopy Society

Published: June 19, 2025

Usefulness of Automated Analysis System for Microvascular Blood Flow Rate Using Magnifying Endoscopy in Early Gastric Cancer: A Multicenter Retrospective Study (With Video).

Usefulness of Automated Analysis System for Microvascular Blood Flow Rate Using Magnifying Endoscopy in Early Gastric Cancer: A Multicenter Retrospective Study (With Video).

Journal: Journal of gastroenterology and hepatology

Published: June 12, 2025

Endoscopic Submucosal Dissection Versus Laparoscopic and Endoscopic Cooperative Surgery for Superficial Duodenal Epithelial Tumors: A Multicenter Retrospective Study.

Endoscopic Submucosal Dissection Versus Laparoscopic and Endoscopic Cooperative Surgery for Superficial Duodenal Epithelial Tumors: A Multicenter Retrospective Study.

Journal: Annals of gastroenterological surgery

Published: April 03, 2025

Association of Constipation and Geriatric Depressive Symptoms: Cross-Sectional Analysis Using Baseline Data from the JUSTICE-TOKYO Prospective Cohort Study.

Association of Constipation and Geriatric Depressive Symptoms: Cross-Sectional Analysis Using Baseline Data from the JUSTICE-TOKYO Prospective Cohort Study.

Journal: Diagnostics (Basel, Switzerland)

Published: March 31, 2025

Grasp-and-lift technique - Novel cold forceps polypectomy technique for a gastric foveolar-type adenoma.

Grasp-and-lift technique - Novel cold forceps polypectomy technique for a gastric foveolar-type adenoma.

Journal: Digestive endoscopy : official journal of the Japan Gastroenterological Endoscopy Society

Published: March 31, 2025

Clinicopathological and Endoscopic Features of Non-Ampullary Duodenal Epithelial Tumors with Gastrointestinal Mixed Phenotype.

Clinicopathological and Endoscopic Features of Non-Ampullary Duodenal Epithelial Tumors with Gastrointestinal Mixed Phenotype.

Journal: Digestion

Published: March 28, 2025

Showing 1-12 of 125

Last Updated: 09/26/2026