支气管源性囊肿最常见于胸腔,发生在腹腔者罕见。我们最近在检查外院送检标本中遇到1例肠系膜支气管源性囊肿,现报告如下。病历摘要患儿为6个月男婴,足月顺产。发现左下腹部包块2个月就诊。B超示左中腹部囊性病变,1个月后复查肿块增大而住院。患儿发育良好,一般情况佳,食欲正常,大小便正常。在左中腹部扪及一包块,表面光滑,质软,可移动,压之患儿无反应。手术见乙状结肠系膜根部有一约8cm×8cm×6cm的肿物,有完整包膜,分离后切除。临床诊断:肠系膜囊肿。病理检查长卵圆形肿物1个,8cm×5cm×4cm,有完整包膜,表面光滑,呈灰白色,有清 Bronchogenic cysts are most commonly found in the chest and are rare in the abdominal cavity. We recently encountered a case of mesenterium-derived bronchogenic cysts in the examination of the hospital for examination of the specimens, are as follows. Summary of medical records of children with 6-month-old boy, full-term follow-up. Found that the lower left abdominal mass 2 months treatment. B ultrasound showed cystic lesions in the middle of the abdomen, 1 month after review of tumor mass and hospitalization. Children develop well, the general situation is good, normal appetite, normal urine. Palpable mass in the left middle abdomen, the surface is smooth, soft, removable, pressure of children with no response. Surgery, see the root of sigmoid mesangial a tumor of about 8cm × 8cm × 6cm, a complete capsule, resection after resection. Clinical diagnosis: mesenteric cyst. Pathological examination of a long ovoid tumor, 8cm × 5cm × 4cm, a complete envelope, the surface is smooth, pale gray, clear