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.