Abstract
Tere were 369 colorectal polyps polypectomized endoscopically during past eight years in Toranomon Hospital, in which 15 polyps of juvenile type were found among 14 patients. The age ranged from 3 to 55 years, 13 patients being over 20 years old. Seventy-seven percent of the patients were male. Seventy-three percent of the polyps were located within the rectum and sigmoid colon. Most Qf these polyps seemed pedunculated in macroscopic appearance, showing smooth and reddish surface with erosions and bleeding. Magnifying photograph of removed specimens showed that structure of pits of juvenile polyps could be hardly visualized. And this is compatible with the fact that the outer surface is often ulcerated. Review of the histology in 15 juvenile polyps revealed metaplastic tubules in nine (60 %) and adenomatous foci in two (13%).
