Yohei M. Koyama
Tokyo, Japan
Last Updated: 09/26/2026
Save publications for later
Sign Up
Not sure about your diagnosis?
Check Your Symptoms
Found 31 publications
Rebleeding Risk of Acute Hemorrhagic Rectal Ulcer: A Multicenter Retrospective Study.
Journal: Internal medicine (Tokyo, Japan)
Published: February 12, 2024
Endoscopic program with a scoring system for surveillance of metachronous esophageal cell carcinoma for older patients considering risk factors after endoscopic resection.
Journal: Esophagus : official journal of the Japan Esophageal Society
Published: October 31, 2023
Risk of map-like redness development after eradication therapy for Helicobacter pylori infection.
Journal: Helicobacter
Published: October 20, 2023
Simple extraction method using a nontraumatic tube for impacted stool in a diverticulum near the ulcer floor after endoscopic submucosal dissection.
Journal: Endoscopy
Published: May 26, 2023
Underwater endoscopic submucosal dissection for colorectal tumors decreases the incidence of post-electrocoagulation syndrome.
Journal: Journal of gastroenterology and hepatology
Published: March 29, 2023
Unique endoscopic and histological findings of early gastric cancer with surrounding map-like redness detected 10 years after successful Helicobacter pylori eradication.
Journal: Endoscopy
Published: February 03, 2023
Visibility of early gastric cancers by texture and color enhancement imaging using a high-definition ultrathin transnasal endoscope.
Journal: Scientific reports
Published: October 24, 2022
Significance of rescue hybrid endoscopic submucosal dissection in difficult colorectal cases.
Journal: Clinical endoscopy
Published: September 29, 2022
Findings of collagenous colitis with minimal endoscopic changes using texture and color enhancement imaging.
Journal: Digestive endoscopy : official journal of the Japan Gastroenterological Endoscopy Society
Published: July 13, 2022
Last Updated: 09/26/2026