Subdural empyema and other suppurative complications of paranasal sinusitis.

Suppurative intracranial infection, including meningitis, intracranial abscess, subdural empyema, epidural abscess, cavernous sinus thrombosis, and thrombosis of other dural sinuses, are uncommon sequelae of paranasal sinusitis. A high index of suspicion is necessary to identify these serious complications. We present a patient with subdural empyema in whom the diagnosis was delayed, followed by a discussion of suppurative complications of sinusitis. The case shows the rapid progression of subdural empyema, which represents a true neurosurgical emergency requiring prompt diagnosis and management.