ABSTRACT
Renal cell tumors represent a heterogeneous group of tumors ranging from benign to malignant neoplasms. Renal cell carcinoma is the most common malignant tumor arising from the kidney and accounting for 90% of renal malignant neoplasms. The male to female ratio is 2: I. It generally presents in late middle age with hematuria, flank pain, abdominal mass, weight loss, and anemia. The risk is increased with cigarette smoking, obesity, Von HippelLindau syndrome (VHL), tuberous sclerosis, and polycystic kidney disease. Patients with kidney tumors are susceptible to develop recurrent urinary tract infection [I], clostridial infection [2], salmonellosis [3], xanthogranulomatous pyelonephritis [4], emphysematous pyelonephritis [5], malakoplakia [6], renocolic fistula [7], renal abscess [8], psoas abscess [9], urinary sepsis [10], purulent cholecystitis [11], and interstitial pneumonia [12]. Bladder cancer accounts for more than 90% of urinary tract malignancies. The male to female ratio is 3: I.
