[Pelvic lipomatosis: cause of bladder rupture].

We have a case of pelvic lipomatosis in a patient suffering from right flank pain and urinary syndrome. Before completing the diagnostic test, abdominal traumatism forced to perform a laparotomy of emergency. We found a great deal of retropubic mass with bladder rupture and thickened walls caused by perivesical fat. The anatomopathological diagnosis was pelvis lipomatosis. This is an unusual case of bladder rupture after slight traumatism.