Acute abdomen--remember spontaneous perforation of the urinary bladder.

Spontaneous perforation of the urinary bladder is a rare clinical condition presenting as an acute abdomen. It should be suspected in patients with a past history of radiotherapy to the pelvis, enterocystoplasty and those suspected of having a tumour in the bladder. Disproportionately elevated serum urea and creatinine should raise the index of suspicion. A case of spontaneous perforation of the bladder, five years following successful treatment of a bladder tumour by radiotherapy, is reported.