neurologic disorders
Intracranial Epidural Abscess and Subdural Empyema
Etiology
Cranial epidural abscess and subdural empyema are usually complications of Sinusitis (especially frontal, ethmoidal, or sphenoidal) or 5 years old, the usual cause is Acute Bacterial Meningitis ; because childhood meningitis is now uncommon, childhood subdural empyema is uncommon. Epidural abscess may extend into the subdural space to cause subdural empyema. Both epidural abscess and subdural empyema may progress to meningitis, cortical venous thrombosis, or brain abscess. Subdural empyema can rapidly spread to involve an entire cerebral hemisphere. 