Renal and ureteral fistulas are uncommon, and when encountered usually are the result either of traumatic injuries or of surgical accidents. The spontaneous development of such urinary fistulas is so rare as to demand notation. Cases of nephrocolic, nephroperirenal, nephrochylous, ureterovesicoperitoneal and ureteroperiureteral fistulas have been studied at the Cleveland Clinic, all of which were the result of advanced pathologic processes which permitted the extravasation of urine into the adjacent organs and tissues.
Spontaneous renal and ureteral fistulas are unusual; their etiology is interesting, and they present difficult therapeutic problems; hence the following case reports.
REPORT OF CASES