Clinical history :
A 65-year-old man was admitted to the hospital with presumed acute prostatitis. A pelvic ultrasound showed an incidental 3.5 x 3-cm, solid, enhancing mass arising from the lower pole of the left kidney. There was no evidence of retroperitoneal adenopathy, renal vein invasion, local extension, or visceral metastases. A partial nephrectomy was performed.
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