[Diagnostic difficulties in spontaneous rupture of the urinary bladder].

A 63-year-old female patient is described with spontaneous rupture of the urinary bladder who was admitted to hospital with signs of diffuse peritonitis. During surgical operation the site of perforation could not be found, and only inflammatory infiltration of the urinary bladder and surrounding tissues was observed. Cystography carried out after the operation revealed the site of perforation only after six hours from the administration of contrast medium. It was sutured during secondary operation. The postoperative course was uncomplicated.