“…In the majority of cases, the presumed, but mistaken, diagnosis is digestive tract perforation [ 2 , 6 , 10 , 14 ], particularly in the presence of pneumoperitoneum [ 2 , 6 , 10 ]. Computed tomography usually shows free fluid [ 4 , 7 , 14 ], but pneumoperitoneum is demonstrated in 16% of the cases [ 9 ]. When diagnosis of bladder perforation is suspected, as in patients with previous bladder surgery [ 7 ], CT cystogram is the most useful diagnostic modality [ 2 , 5 , 7 , 14 ].…”