作者：王悦，宋莹，丁思奇，崔铭毓，段立伟

单位：吉林大学第二医院 胃肠内科及消化内镜中心， 吉林 长春 130041

Authors: Wang Yue，Song Ying，Ding Siqi，Cui Mingyu，Duan Liwei

Unit: Department of Gastrointestinal Medicine，the Second Hospital of Jilin University，Changchun 130041，Jilin，China

摘要：

与肝、肺、骨等器官不同，胃肠道很少有继发性肿瘤，继发性胃肠道肿瘤内镜下多表现为隆起性或溃疡性病变伴局部黏膜红肿。本文报道1例结肠镜下表现为直肠炎及直肠环形狭窄的继发性直肠癌，并结合相关文献探讨其内镜特征及治疗方案。

关键词：继发性直肠癌； 巢状变异型尿路上皮癌； 结肠镜

Abstract：

Contrary to the liver，lung，bone，and other organs，the gastrointestinal tract rarely involves secondary tumors，and secondary gastrointestinal tumors are mostly manifested as protuberance or ulcerative lesions with local mucosal redness and swelling under endoscopy. In this paper ，a case of secondary rectal cancer with proctitis and rectal annular stenosis under colonoscopy was reported ，and its endoscopic characteristics and treatment plan were discussed in combination with relevant literature.

Key Words:  Secondary rectal cancer； Nested variant urothelial carcinoma； Colonoscope