Subdural Empyema as a Complication of Sinusitis: A Diagnosis to Keep in Mind

Subdural empyema (SDE) is a rare form of intracranial infection associated with a high morbidity and mortality rate. Infections of the middle ear and paranasal sinuses are the most common predisposing factors that can lead to bacterial proliferation in the subdural space, usually by direct extension in young patients. Clinicians must have a high level of suspicion for patients presenting with concomitant neurological deficits and signs of sinus pathology. Cross-sectional imaging is mandatory for the diagnosis, preferably contrast-enhanced magnetic resonance imaging. Treatment requires a prolonged course of intravenous antibiotherapy and prompt neurosurgical drainage intervention. Here, we present the case of a 20-year-old patient with long-term neurological sequelae following a left paranasal infection complicated by an SDE. This case report highlights the rapid progression and devastating consequences of SDE, an ominous neurosurgical emergency.