患者　男 ,46岁。左上腹部持续性胀痛半月余 ,并逐渐加重 ,肿块明显增大。查体 :左上腹部触及大小约 15cm× 15cm的包块 ,表面光滑 ,活动较固定 ,压痛 (+ ) ;无反跳痛 ;实验室检查 :无异常改变 ;肾盂静脉造影 :左肾不显影。B超检查 :左肾下极可探及巨大囊实性包块 ,其内回声不 Male patient, 46 years old. Continuous pain in the upper left abdomen more than half a month, and gradually increased, the mass was significantly increased. Physical examination: The left upper abdomen touches a mass of about 15cm × 15cm in size, with a smooth surface and relatively fixed activity, with tenderness (+); without rebound pain; laboratory examination: no abnormal changes; renal pelvis and vein angiography: left kidney is not developed. B-ultrasound: the left kidney can be very exploration and huge cystic solid mass, the echo is not