title: The relationship between urinary bilharziasis and urolithiasis in the Sudan.
abstract: Nine hundred and ninety-seven Sudanese patients presenting to a urological unit in Khartoum were divided into a group consisting of 144 patients with a history or evidence of urinary bilharziasis and a second group of 853 patients with no history or evidence of this disease. Thirty-one per cent of the patients with bilharziasis and 32% of those without were found to have urinary calculi. In the bilharzial group there were recurrent stones in 7% compared with 12.4% in the non-bilharzial group. In the bilharzial group the stones were renal in 63.6%, ureteric in 27.3% and vesical in 9.1%, while in the non-bilharzial group 57% were renal, 30% ureteric and 13% vesical. Comparison of the incidence, rate of recurrence and site of stones in both groups suggests that urinary bilharziasis does not contribute to the high incidence of urolithiasis in the Sudan.
mesh_terms: D003251:Constriction, Pathologic / Q000150:complications; D006801:Humans; D007669:Kidney Calculi / Q000150:complications; D012008:Recurrence; D012552:Schistosomiasis / Q000150:complications*; D013397:Sudan; D014514:Ureteral Calculi / Q000150:complications; D014515:Ureteral Diseases / Q000150:complications; D001744:Urinary Bladder Calculi / Q000150:complications; D014545:Urinary Calculi / Q000150:complications* / Q000175:diagnosis; D014570:Urologic Diseases / Q000150:complications*