72.病人主訴右側腰部悶痛，血液中白血球數目正常，超音波檢查發現右側腎臟腫塊，電腦斷層檢查如附圖，下列何種診斷最正確？ (A)renal cell carcinoma (B)urothelial cell carcinoma (C)renal angiomyolipoma (D)xanthogranulomatous pyelonephritis