Giant Villous Tumors of the Rectum A Review of 5 Cases

Abstract

During the ten years period from 1671-1980 five patients with giant villous tumors of the rectum were surgically treated. So-called villous tumors consists of various histopathological patterns, for example, of benign inflammatory lesions, tubular adenomas, villous adenomass and villous carcinomas, though their clinical signs and symptoms, laboratory findigs, X-ray and proctoscopic features are almost same in the present series. Within one villlous tumor, we often observe two or three different histological components thus sometimes we can not give the correct diagnosis preoperatively.
Villous tumor of the rectum is rare in Japan, but their malignant change has been reported not infrequently. If a villous tumor is found, we should totally execise it and the specimen must be carefully examined. Then we should decide a plan for further treatment.
Macroscopic giant villous tumors should be treated as an established clinical entity of colonic tumors.