Post-traumatic acute obstructive hydrocephalus.

Two cases of acute obstructive hydrocephalus from intraventricular hemorrhage following head injury are presented. Each patient was involved in a motor vehicle accident and sustained closed-head trauma. Computed tomography scans revealed a fourth ventricular hematoma with obstructive hydrocephalus in each case, and both cases required emergency ventricular drainage to manage acute cerebrospinal fluid hypertension. Ventriculostomy resulted in complete recovery in the first case; however, the second patient eventually underwent ventriculoperitoneal shunting. One patient manifested an eight-hour lucid interval prior to neurologic deterioration.