直肠脱垂是指直肠或乙状结肠下段的粘膜层或全层肠壁经肛管向外突出于肛门外的一种病理状态。临床上并不常见。笔者近期诊治1例膀胱结石致直肠脱垂病人,报告如下。患者,男,18岁,住院号78777。因排便时肛门脱出肿物半年而于1990年12月4日入院。病人半年 Rectal prolapse refers to the lower rectal or sigmoid colon mucosa or the whole layer of intestinal wall protruding through the anal canal outside of a pathological state. Not clinically common. I recently diagnosed a case of bladder stones caused by rectal prolapse patients, the report is as follows. Patient, male, 18 years old, hospital number 78777. Anorectal prolapse due to defecation for six months and on December 4, 1990 admission. Six months patient