Objective:To explore the endoscopy and histopathological morphology of colorectal serrated adenomas ( SA ) .Method:48 SA patients diagnosed by endoscopiy and pathology in Chengde Central Hospi -tal from January 2009 to December 2013 were analyzed respectively .Result:90 SA were detected from 48 patients, 37 cases of flat, 53 cases of uplift.SA was frequently located in the sigmiod colon and rectum . There were pathology mild dysplasia 72 cases,moderate dysplasia 10 cases,sevee dysplasia 8( cancertionfoci 6 cases).The dysplasia of SA≥10 mm was significantly worse than that of SA <10 mm ( P<0.05).Conclu-sion:The SA not only have endoscopy specificity ,but also have certain canceration rate .We shoud early dis-covery, early diagnosis, early treatment.%目的：探讨结直肠锯齿状腺瘤（ SA ）的内镜表现及病理学特征。方法：收集分析本院内窥镜室2009年1月至2013年12月所有接受结肠镜并经病理证实的SA 48例。结果：48例患者共检出SA90枚，其中37枚为扁平型，53枚为隆起型；SA常见于乙状结肠及直肠。病理学轻度异型增生72枚，中度10枚，重度8枚，其中6枚癌变。大于或等于10mm SA 较10mm以下的SA异型程度重（ P＜0．05）。结论：大肠SA内镜下表现无特异性，具有一定的癌变率，应早期发现、早期诊断，早期治疗。
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