Idiopathic hydronephrosis in childhood--a comparison between diuresis renography and upper urinary tract morphology.

Twenty-seven children undergoing surgery for suspected pelviureteric junction obstruction were studied by pre-operative diuresis renography. The results obtained by this test were compared with histological and histochemical studies of the resected specimens of renal pelvis. A significant correlation was found between these methods of assessment. In addition, the morphological appearances of the renal pelvis tended to show more marked changes in the younger children.