患者男,65岁。发现左上腹肿物2月余伴轻度腰痛,无乏力、消瘦、发热等。体检左中上腹触及一14ｃｍ×15ｃｍ大小肿物,质中、光滑,稍活动无压痛,左肾区轻度叩痛。ＣＴ检查左肾前方见一77ｃｍ×137ｃｍ囊性肿物,内有分隔,ＣＴ值1ＨＵ(图1),增强后肿物无强化。左肾向外、下移位,且左 Male patient, 65 years old. Left upper quadrant was found in February with mild back pain, no fatigue, weight loss, fever and so on. Physical examination of the left upper abdomen touched a 14cm × 15cm size of the tumor, quality, smooth, slightly activity without tenderness, left renal area mild percussion pain. CT see a left front of the kidney see a 77cm × 137cm cystic tumor, within the separation, CT value 1HU (Figure 1), enhancement of the tumor without strengthening. Left kidney outward, down shift, and left