Solution: Blunt trauma to the bladder can result in injuries from a bladder contusion to a bladder tear without serosal involvement to a bladder rupture. There are two types of bladder rupture. The more common is an extraperitoneal bladder rupture, which is usually associated with pelvic fractures and associated avulsion/puncture of the bladder with the leak usually occurring at the anterolateral aspect of the bladder base. There is flame-shaped extravasation into the extraperitoneal space often filling the space of Retzius (named after Anders Retzius, a swedish professor of anatomy). Intraperitoneal bladder ruptures as is seen in this case, are usually associated with a distended bladder at the time of the blunt trauma with subsequent decompression of the bladder through the dome of the bladder into the peritoneal space. Contrast is seen in the paracolic gutters and surrounding small bowel loops on delayed images or cystogram images. Treatment is usually surgical for intraperitoneal ruptures, but often treated conservatively with extraperitoneal ruptures.