Fig. 1.

CT scans of an 85-year-old woman. A Few hours after a bicycle accident without loss of consciousness. There is not any intracranial lesion. B Ten days after the accident slight speech disturbance is noted. C Twenty-one days after the accident. The patient suffers from continuous headache, mild hemiparesis on the left, and psychomotor slowness. D One month after surgery the patient has recovered completely