Figure 1. Pre- and postoperative imaging: sequential computerized tomography scans of the head (A) before surgery, (B) on the tenth postoperative day, and (C) 4 weeks after surgery, showing progressive resolution of the residual subdural collection (black arrows along the surface of the cerebral hemisphere). The white vertical arrow on image B shows residual intracranial air, a common and desirable feature early after surgical evacuation of a subdural hematoma. (D) Image performed 6 months later after the patient had a fall: the white arrow points to the site of the burr hole.