患者,男,55岁。因腹痛、腹胀伴肛门停止排便排气5d入院。查体:腹部明显膨隆,可见胃肠型及蠕动波,全腹轻压痛,叩鼓音,移动性浊音(-),肠鸣音亢进,可闻及气过水声。膝胸位肛查:肛门外形正常,进指顺利,齿状线以上布满直径约0.2~0.8cm大小肿块,质硬,无蒂,退指指套染暗红色血液。拟诊 Patient, male, 55 years old. Due to abdominal pain, abdominal distension with anus to stop defecation exhaust 5d admission. Physical examination: the abdomen was bulging, gastrointestinal and peristaltic waves can be seen, the whole belly light tenderness, percussion drum sound, shifting dullness (-), bowel sounds hyperthyroidism, can be heard and gas over the water. Ankle anus anal examination: normal anus, into the finger smoothly, over the dentate cord covered with a diameter of about 0.2 ~ 0.8cm size mass, hard, no pedicle, fingerprints dyed dark red blood. To be diagnosed