Nondilated Obstructive Uropathy

Abstract

Obstructive uropathy can occur in the absence of upper tract dilatation, as illustrated by three cases from the authors' experience. Cancer is often a predisposing factor. Conventional radiologic studies such as ultrasound and CT often are not helpful, and percutaneous puncture of the kidney, although difficult in these patients, may be necessary for both diagnosis and treatment. The clinician must be aware of the possibility that obstruction has occurred in the absence of hydronephrosis.