[Schistosomiasis of the urinary bladder].

A 12 year old male immigrant from Somalia was admitted to hospital after several years of haematuria and dysuria. Microscopic examination of the urine revealed eggs of the Schistosoma haematobium. Urine culture was negative. Cystoscopy showed a characteristic bilharzial tubercle, and numerous sandy patches were also seen. Mucosal biopsy showed schistosoma eggs, some with calcification. There was squamous cell metaplasia and infiltration of plasma cells and eosinofilic granulocytes. The patient was treated with praziquantel 600 mg x 4 for two days. Three months later no schistosoma eggs were seen in his urine and cystoscopy was negative. In immigrants from countries where bilharzia is endemic, it should be considered a differential diagnosis in patients with haematuria.