小肠Meckel憩室是最常见的胃肠道先天性畸形,发生率为0.3％～3.0％,大多数无症状,但17％～22％。病人可表现为出血、腹痛和肠梗阻。成年人小肠梗阻占全部有症状憩室的1/3,并可导致肠套叠,肠扭转和肠粘连。作者报道1例由长的Meckel憩室导致小肠绞窄的CT表现。男性,21岁,间歇性腹部剧痛和恶心2天。腹胀,轻压痛,肛诊未见异常,大便潜血阴性,WBC 19 400/mm~3。腹部平片显示多个扩张小肠肠襻,伴液气面,升结肠有少许气体。腹部和盆部CT增强扫描显示多个扩张充满液体的小肠肠襻,肠壁增厚,均匀强化,少量腹水,一束状段与 Small bowel Meckel diverticulum is the most common gastrointestinal congenital malformations, the incidence of 0.3% to 3.0%, most asymptomatic, but 17% to 22%. Patients can be manifested as bleeding, abdominal pain and intestinal obstruction. Small bowel obstruction in adults accounts for one third of all symptomatic diverticula and can cause intussusception, intestinal torsion and intestinal adhesion. The authors reported a CT scan of small bowel strangulation caused by a long Meckel diverticulum. Male, 21 years old, with intermittent abdominal pain and nausea for 2 days. Abdominal distension, mild tenderness, anorectal anomaly, fecal occult blood negative, WBC 19 400 / mm ~ 3. Abdominal plain film showed multiple expansion of intestinal intestine, with liquid gas, ascending colon, a little gas. Abdominal and pelvic CT enhanced scans showed multiple expansion of the intestine filled with liquid intestine, thickening of the intestinal wall, uniform enhancement, a small amount of ascites, a bunch of segments and