患者女,34岁,因腹部包块伴左腰部隐痛不适3个月入院。查体:左上腹可触及约16cm×12cm质硬肿块,表面光滑,边界清,活动性差。术前B超示腹膜后有约16cm×12cm囊实性肿瘤,内回声不均质。术前诊断:腹腔肿瘤。在持续硬膜外麻醉下剖腹探查。术中见腹膜后有约16cm×12cm囊实性肿瘤,与乙状结肠系膜、左肾下极脂肪囊粘连。探查胰 The female patient, 34 years old, was hospitalized for 3 months due to abdominal pain and discomfort in the left lower back. Examination: The left upper abdomen can reach about 16cm × 12cm hard mass, the surface is smooth, the border is clear, activity is poor. Preoperative B-mode ultrasound showed a retroperitoneal cystic tumor of approximately 16cm x 12cm, and the internal echo was not homogeneous. Preoperative diagnosis: abdominal cavity tumors. Laparotomy under continuous epidural anesthesia. During the operation, there were approximately 16cm x 12cm cystic solid tumors behind the retroperitoneum, which adhered to the sigmoid mesocolon and the adrenal gland of the left kidney. Exploring pancreas