The spontaneous intraperitoneal rupture of the urinary bladder is an e
xtremely rare life threatening event. There are often difficulties in
making the diagnosis. A case of spontaneous rupture of the bladder 6 y
ears after radiation therapy for uterus cancer is reported. An early s
urgical exploration including the closing of the rupture, peritoneal l
avage and continuous vesical drainage will save the life of the patien
t.