Idiopathic retroperitoneal fibrosis of the bladder

A patient is described with isolated idiopathic retroperitoneal fibrosis (IRPF) of the bladder causing overhydration due to postrenal oliguria. IRPF is known to spread to the bladder; restriction of the bladder, however, is extremely rare. The patient was successfully treated with corticosteroids. The potential role of corticosteroids in the management of IRPF is discussed.