患者男性,53岁。腹痛、腹泻、心慌及多汗等半年,因腹痛明显加重伴明显腹胀入当地医院。查体:腹壁紧张,可见肠型,脐周触及一肿物,质硬,界限不清,不活动,压痛明显。诊断为急性肠梗阻。术中发现肠系膜上动脉根部有一不规则肿物,8×7×5cm~3大小,与后腹膜、横结肠系膜粘连,肠管扭转不足 The patient is male, 53 years old. Abdominal pain, diarrhea, palpitation and hyperhidrosis for six months, due to abdominal pain significantly increased with obvious abdominal distention into the local hospital. Examination: abdominal wall tension, visible intestinal type, umbilical contact with a tumor, hard, unclear boundaries, inactivity, tenderness. Acute intestinal obstruction was diagnosed. During the operation, an irregular mass was found at the root of the superior mesenteric artery, which was 8×7×5cm~3 in size. It was associated with the posterior peritoneum and transverse mesorectum and the bowel was under-twisted.