Computed tomography (CT) was compared with plain films and intravenous urography in 20 male patients with schistosomiasis. CT better demonstrated the extent of calcifications, which were recorded in the urinary bladder in all cases. The anterior wall of the bladder is first affected. The length and nature of stricture of the ureter can be estimated with CT, and ureteral reflux may be demonstrated when fatty emulsion is used for filling the bladder and the ureter is dilated. Punctate ureteral wall calcifications may be distinguished from intraureteral stones. CT is also helpful in establishing the presence and the staging of bladder tumors.