Extravasation from the unused bladder during cystography: case report.

Spontaneous, asymptomatic extravasation during retrograde cystography occurred in a quadraplegic patient who had been maintained on constant Foley catheter drainage for 7 years. This phenomenon has recently been described in a few anuric patients being studied prior to renal transplant and is probably related to the chronic disuse status of the bladder. It is a self-limiting process and, in the absence of a clinical reaction, only observation is warranted.