Related Experiment Video For Anisakis
Updated: Apr 6, 2026

Structured Approach to Colonoscopy Technique Optimization: A Single-Center Experience with Novice Endoscopists
Published on: July 11, 2025
Asymptomatic anisakiasis of the colon incidentally found by colonoscopy
Gentaro Taniguchi1, Akihito Nagahara2, Kenshi Matsumoto2
1Department of Gastroenterology, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan. gtanigu@juntendo.ac.jp.
Abstract:
Asymptomatic anisakiasis of the colon is a rare condition that is difficult to diagnose. A 42-year-old man with no symptoms was referred to our department because of elevated serum carcinoembryonic antigen (CEA) levels detected previously at another hospital. A colonoscopy was performed to find the reason for these elevated CEA levels, and Anisakis larvae were identified by chance in the ascending colon wall. This is only the fourth case of asymptomatic anisakiasis of the colon to be reported worldwide.
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