Medical Conditions

Chronic accumulation of blood in the subdural space, most frequently occurring over the lateral and superior aspects of a cerebral hemisphere. Clinical manifestations may be delayed for days to weeks, when affected individuals may present with confusion, drowsiness, hemiparesis, ATAXIA, APHASIA, and other signs of neurologic dysfunction. The condition tends to occur after the age of 50 years. It may be spontaneous, follow CRANIOCEREBRAL TRAUMA, or occur in association with bleeding disorders, the use of anticoagulant medication, locally invasive tumors, and other disorders. (From Adams et al., Principles of Neurology, 6th ed, p887)