Delayed deterioration after head trauma due to traumatic aneurysm.

Closed head trauma is fairly common in our industrialized society. A small percentage of affected patients develop traumatic intracranial aneurysms, which rupture an average of three weeks following injury resulting in sudden neurological deterioration. The case of a patient with a traumatic aneurysm is presented. A high index of suspicion is necessary to diagnose these lesions, for which surgical treatment is recommended.