A 56-year-old man and a 70-year-old woman, with histories of left colectomy
and appendectomy respectively, were admitted to our hospital. In both case
s, colonoscopy showed a pedunculated colonic polyp in the ascending colon,
and a silk suture became visible in the stalk during polypectomy. The histo
logical diagnosis was adenoma. These two cases constitute the first report
of colonic adenomatous polyps accompanied by suture migration.