Spontaneous rupture of a bladder diverticulum: ultrasonographic diagnosis.

We report a rare case of spontaneous rupture of a large bladder diverticulum that was diagnosed accurately and promptly using abdominal ultrasonography. Instillation of saline and air into the bladder on ultrasonography demonstrated jetting from the wall of the bladder diverticulum. We recommend this useful imaging technique, which can be performed easily in the emergency room, in all suspected cases of bladder rupture.