1病例报告患者男,56岁,因腹痛、腹胀伴黑便3d入院。既往体健,无慢性腹痛史。查体:体温37·8℃、脉搏60/min、血压120/100mmHg。意识清楚,营养中等,口唇略发绀。腹部膨隆,全腹压痛、反跳痛、肌紧张,移动性浊音阴性,肠鸣音未闻及。直肠指诊肛门及直肠下端未扪及肿块,指套退出可见 A case report Male patient, 56 years old, due to abdominal pain, abdominal distension with melena 3d hospitalization. Past physical health, no history of chronic abdominal pain. Physical examination: body temperature 37.8 ℃, pulse 60 / min, blood pressure 120 / 100mmHg. Consciousness, moderate nutrition, slightly cyanotic lips. Abdominal bulging, total abdominal tenderness, rebound tenderness, muscle tension, mobility voiced negative, bowel sounds not heard. Rectal finger anus and rectal lower palpable mass, finger sets exit visible