Treatment of Chronic Subdural Hematoma by Corticosteroids

Inclusion Criteria: * Age 18 years old, * With chronic or subacute, uni or bilateral subdural hematoma, * Confirmed by cerebral scan without contrast enhancement, * Without clinical and radiological signs of severity, * Written informed consent from patients or their next of kin according to the patients cognitive status. Exclusion Criteria: * Diabetics patients, * Contraindication for methylprednisolone, * Previous surgery for chronic subdural hematoma during the past 6 months, * Pre-existing severe dementia related to other etiology than the Chronic subdural hematomas, * Existing neurological pathology that can be associated with dementia, * Patients treated with corticosteroids, * Protected person (adults legally protected (under judicial protection, guardianship or supervision), person deprived of their liberty, pregnant woman, lactating woman and minor), * Participating in other concomitant research.