en Urology and Nephrology Urology and Nephrology Original Research Original Research 41 patients with trauma to the urinary bladder are reviewed. 70 percent were injured as a result of blunt trauma and 63 percent of patients had an associated fracture of the pelvis. 82 percent of extra peritoneal ruptures were associated with fracture of the pelvis. The most common cause of trauma was car accident (56 percent), followed bywar injury (25 percent). The incidence of intra and extra peritoneal rupture was nearly equal. The most common presentation was abdominal pain and tenderness (48 percent), followed by gross hematuria (37 percent). In 16 patients diagnosis was made by retrograde cystography and in another six by intravenous pyelography. The remaining patients were diagnosed by physical examination and diagnostic laparotomy. All of the patients were treated by surgical repair . Mortality rate was two percent. 31 36 http://mjiri.iums.ac.ir/browse.php?a_code=A-10-298-792&slc_lang=en&sid=1 AA KHEZRI 20031947532846006607 20031947532846006607 Yes From the Department of Urology, Shiraz University of Medical Sciences, Shiraz, Islamic Republic of Iran.