[Congenital solitary kidney with hydronephrosis: report of five cases].

Congenital solitary kidney with hydronephrosis is a rare anomaly. Five cases including 4 boys and 1 girl were detected to have this disease in the last 3 years. Of the patients, a case had hydroureter. Ages ranged from 8 to 12 years. The intermittent abdominal pain was complained in one case. The enuresis was noted in another case. The other 3 cases were asymptomatic. The anomaly in these patients incidentally detected with ultrasound and then was confirmed by intravenous urogram and/or radionuclide scan. Diuretic radionuclide renogram T1/2 was used in these patients. A patient with UPJ obstruction was demonstrated and received surgery. Others were non-obstructive and followed up at OPD. Since sonography is a noninvasive modality, it can serve as a tool for long-term followup of such nonoperative patients for the evidence of urinary infection and stone formation, and the status of the functional solitary kidney.