Pediatric update #6. False aneurysm arising from a closed femur fracture in a child.

A 10-year-old boy presented to the emergency room with a closed left femur fracture after being hit by an automobile. Because of diminishing pulses in his extremity, an arteriogram was performed revealing a 2.5 x 2.0 cm pseudoaneurysm of the popliteal artery. To our knowledge, this is the first case report of a young child with this type of injury.