1980年4月～1999年3月,20年间我院内镜室共行纤维结肠镜检查19645例,检出大肠息肉2154例,其中癌变75例,癌变率为3.48%。本文对75例癌变息肉与同期发现1045例的大肠癌就临床内镜和病理方面的特征进行对比分析。1　临床资料1.1　一般资料75例息肉癌变病例中,男性34例,女性41例;年 From April 1980 to March 1999, 19645 cases of colonoscopy were performed in the endoscopy department of our hospital for 20 years. 2154 cases of colorectal polyps were detected, of which 75 cases were cancerous and the cancerous rate was 3.48%. This article compared the clinical endoscopic and pathological characteristics of 75 cases of cancerous polyps with 1045 cases of colorectal cancer. 1 Clinical data 1.1 General Information Among 75 cases of polyposis, 34 were males and 41 were females;