Occlusion of the basilar artery within a fracture of the clivus. Case report.

Following a 15-foot fall from a roof, a 70-year-old man became comatose and developed signs of pontine dysfunction. There was a severely comminuted fracture of the distal left femur suggesting that he had landed in an upright position. It was clinically unclear whether the fall was secondary to a pontine infarct; however, an autopsy revealed a fracture of the clivus which had entrapped and occluded the basilar artery, causing death. These findings, and those in similar cases, suggest that this entity results from a force transmitted in an axial direction.