Urinary tract obstruction secondary to cerebrospinal fluid cysts.

Bilateral hydroureteronephrosis secondary to mechanical kinking of the ureteral-conduit anastomosis or ureteral compression caused by a large intra-abdominal cerebrospinal fluid cyst should be considered in patients who have ventriculoperitoneal shunts, abdominal ascites, and deteriorating upper tracts. Therapy directed at correction of the cerebrospinal fluid cyst should be sufficient to correct the urologic dysfunction.