Overview
Definition
Bleeding between the dura and arachnoid mater.
Epidemiology
Varies globally depending on genetics, environment, or exposure.
Etiology & Risk Factors
- Tearing of bridging veins (common in elderly, alcoholics).
Clinical Symptoms
- Gradual onset of headache
- confusion
- focal neurologic deficits over weeks.
Clinical Approach
Diagnosis
- CT Head (Crescent-shaped hyperdensity crossing suture lines).
Management
- Surgical evacuation (burr hole).
Complications
- Coma
- brain herniation.