Fifteen elderly patients with chronic subdural haematoma were studied by various clinical and laboratory methods, including lumbar puncture, roentgenography, electroencephalography, echo‐encephalography, air studies and exploratory craniotomy. A history of head injury was obtained in only 6 of the 15 cases.
Two mechanisms seem to account for the neurological picture: 1) disturbed cerebral arterial circulation owing to direct pressure of the haematoma on the main artery of the hemisphere, and 2) progressive cerebral edema owing to impaired venous return. Since the condition of the patient may vary, the signs and symptoms may be confused with those of transient cerebral ischemic attacks. With early diagnosis and treatment of chronic subdural haematoma in the elderly, the prognosis is excellent.