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患者 男，５７岁。发现左上腹无痛性肿块３月余，无腹部外伤史。体检：腹软，左上腹可触及一２０ｃｍ×１２ｃｍ大小肿块，质中，边界清楚，可活动，无压痛。Ｂ超检查：左上腹部分实质性部分多房囊性占位病变。大剂量ＩＶＰ：左肾区巨大致密块影，边缘光滑，左肾实质及左肾盂?
Male patient, 57 years old. No pain was found in the left upper quadrant more than 3 months, no history of abdominal trauma. Physical examination: Abdominal soft, left upper abdomen can reach a 20cm × 12cm size mass, quality, the boundary is clear, can be activity, no tenderness. B-ultrasound: part of the left upper quadrant of the substantive part of multiple cystic lesions. High-dose IVP: a huge block of left kidney area shadow, smooth edges, left renal parenchyma and left renal pelvis?