Findings: Relatively small right kidney with decreased cortical thickness, moderate hydronephrosis & mild perinephric fat stranding. Relatively small right renal artery. Dilated tortuous right ureter up to the right sacroiliac joint where there is a zone of transition and distal to this the ureter is of normal caliber. A focal abnormality measuring approximately 5.5 cm in craniocaudal length, having an average density of 30, 84, 86 & 81 HUs on plain, arterial, venous & renal excretory phases respectively, is seen in the right ureter (L3--L5 level). Left kidney, ureter and urinary bladder are grossly normal. Mildly bulky lateral limb of left adrenal gland. Impression: Right ureteric enhancing lesion suspicious of transitional cell carcinoma (TCC) with proximal hydroureteronephrosis and relatively small right kidney.