大肠息肉癌变及内镜处理第一军医大学南方医院（广州，５１０５１５）冯福才，张亚历１　息肉癌变的定义息肉癌变通常指腺癌性息肉出现恶性变化而言，其基本特征是细胞核异型，极性消失，核浆比例增加及出现多量核分裂象等。根据其浸润深度可分为原位癌和浸润癌，两者以粘... Carcinogenesis and endoscopic treatment of colorectal polyps First Military Medical University, Nanfang Hospital (Guangzhou, 510515) Feng Fucai, Zhang Yali1 Definition of polyposis Carcinogenesis generally refers to the malignant changes of adenocarcinoma polyps. Its basic features are nuclear heteromorphism and loss of polarity. , The proportion of nuclear plasma increases and there are a large number of nuclear splitting images. According to the depth of invasion can be divided into in situ cancer and invasive cancer, both to stick ...