Prolonged oliguria in a posttransplant patient.

The present case represents, to our knowledge, the longest period of oliguric renal failure after renal transplant with eventual recovery reported to date. The disparity between the renogram and the eventual results of renal biopsy specimen examination highlights the difficulty in managing such patients. The renal biopsy specimen in such patients may provide not only diagnostic information, but also may have direct bearing on contemplated alterations in drug regimens.