Contrecoup haemorrhage in a patient with left pubic fracture but right obturator artery bleeding.

Contrecoup injury following head trauma is well known. It is caused by the acceleration-deceleration mechanism that can be fully explained by Newton's first law of motion. We report on a victim of a motor vehicle accident with non-displacement left pubis fracture but haemorrhage from the right obturator artery. Contrecoup haemorrhage should be excluded first in unstable patients without evidence of significant trauma but with a minor pelvic fracture.