患者女性，33岁。左上腹隐痛半月，无发热，无恶心呕吐，无头晕、心慌、冷汗等低血糖表现。体检：左上腹深触诊触及肿块边缘。B超检查发现胰尾之左、脾脏之下、左肾之前有一实质性不均质肿块9cm×9cm，考虑为腹膜后占位病变。遂行剖腹探查术。术中发现左上腹肿块20cm×20cm×15 The patient is 33 years old. Left upper quadrant pain and half months, no fever, no nausea and vomiting, no dizziness, palpitation, cold sweat and other hypoglycemia performance. Physical examination: Deep palpation of the left upper quadrant touches the edge of the mass. B-ultrasound revealed that there was a substantial inhomogeneous mass of 9cm x 9cm in the left, lower, and left kidneys of the pancreatic tail, which was considered as a retroperitoneal space-occupying lesion. The laparotomy was performed. Left upper abdominal mass 20cm×20cm×15 found during operation