School ager with a handlebar injury and abdominal pain

CT of bowl trauma / bowel perforation
Initial axial CT with contrast of the abdomen (left images) shows no solid organ injury but a moderate amount of free fluid in the abdomen and pelvis. Repeat axial CT with contrast of the abdomen obtain a day later due to increasing abdominal pain (right images) shows a marked increase in the free fluid within the abdomen and pelvis.

The diagnosis was bowel perforation.