Most tumors of the upper urinary tract are epithelial tumors from transitional cell origin. They are more frequent in the renal pelvis than in the ureter. They may be single or multiple and rarely bilateral. Gross hematuria is the most common presenting form. Computed tomography is useful both in the diagnosis and staging and is much more contributive than intravenous pyelography. Nephroureterectomy with a bladder cuff is the standard treatment for upper tract tumors. In selected cases are low grade and low stage tumors, conservative surgery can be discussed with similar longterm results than radical surgery.