大肠的锯齿状腺瘤指大肠的一类特殊病理形态的腺瘤,其成瘤上皮成分有明显增生,使腺管或绒毛呈现锯齿状外观,类似于增生性息肉样改变,或腺瘤成分与增生性息肉成分同时存在。1990年Longacre TA报告了110例这种形态的腺瘤,并将其命名为混合型增生性腺瘤样息肉/Serrated腺瘤,后被简称为Serrted腺瘤即锯齿状腺瘤。有研究证实锯齿状腺瘤与大肠癌关系密切。关于其内镜下形态及病理特征,我国尚未见有文献报道。我们自2000年12月1日至2001年4月30日从常规肠镜检查中检出锯齿状腺瘤7例,现报告如下: The serrated adenoma of the large intestine refers to a type of adenoma of the large intestine with a special pathological morphology. Its tumor-epithelial component has a marked hyperplasia, giving the glandular or villi a jagged appearance, similar to hyperplastic polypoid changes, or adenomas with Hypertrophic polyps are present at the same time. In 1990, Longacre TA reported 110 cases of this form of adenoma and named it mixed proliferative adenoma-like polyps/Serrated adenomas. It was later referred to as Serrted adenomas, serrated adenomas. Studies have confirmed that serrated adenomas are closely related to colorectal cancer. With regard to its endoscopic morphology and pathological features, no literature has been reported in China. We have detected 7 cases of serrated adenomas from routine colonoscopy from December 1, 2000 to April 30, 2001. The report is as follows: