Abstract
At first, some special techical points of our endoscopic examination and polypectomy of the colon and rectum were described. Next, a series of 363 polyps endoscopically removed during the period from March 1975 through December 1984 at our department were analysed. The largest number of these polyps was found in the rectosigmoid colon and the most common histologic type was adenoma. So-called cancer in adenoma was found in 31 out of these 363 polyps, or 8.5%. Especially, the frequency of malignant change among polyps 1.0 cm or greater in its largest diameter was 23%. As metachronous development of polyps was frequently found in patients who had two or more polyps at the time of the initial colonoscopic examination, close follow up is mandatory in these patients. Serious complication was not encountered in our series. Now colonoscopic polypectomy is safely performed. We suggest that colonoscopic polypectomy should be recommended as a means of reducing the incidence of colorectal malignancy.
