患男,30岁。发作性右下腹痛伴便血4年,加重1周入院。4年来无明显诱因反复发作右下腹疼痛伴暗红色血便,发作无明显规律性。发作时右下腹似可触及一拳头大包块,质软,并可闻及肠鸣,疼痛呈绞痛,不放散,持续时间10～20min不等,用手按压或转动体位包块可消失,疼痛亦可缓解,随之出现便血现象。4年来发作渐频繁,便血量亦渐增多。曾多次在外院住院治疗,行纤维胃镜、纤维结肠镜、全消化道钡剂造影、腹部B超等检查均未发现异常,给予对症治疗后缓解出院。本次入院前1周患者又出现右下腹疼痛,疼痛时间较前延长,伴恶心、呕吐,呕吐物为胃内容物,同时 Suffering from men, 30 years old. The onset of right lower abdominal pain with blood in the stool for 4 years, an increase of 1 week admission. In 4 years, there was no obvious cause of recurrent episodes of pain in the right lower abdomen with dark red bloody stools, and there was no obvious regularity in seizures. When the attack occurs, the right lower abdomen seems to touch a large fist mass, which is soft and can smell bowel. The pain is cramps and does not dissipate. The duration varies from 10 to 20 minutes. The hand or rotation of the mass can disappear. Pain can also be relieved, followed by blood in the stool. Attacks have become more frequent in the past 4 years and blood volume has also increased. He had been hospitalized in the hospital for many times. No abnormality was found in the examination of fiberoptic gastroscopy, colonoscopy, total digestive tract barium bolus, abdominal ultrasound, etc. He was relieved from hospital discharge after symptomatic treatment. A week before admission, the patient presented with pain in the right lower abdomen. The pain lasted longer, with nausea, vomiting, and vomit as stomach contents.