Unexpected expansive paranasal sinus mucormycosis.

Mucormycosis infection of the paranasal sinuses is a very rare but serious condition. Patients are usually immunocompromised by systemic disease. We report an unexpected case of expansive paranasal sinus mucormycosis in an immunocompetent European treated successfully with surgical debridement and intravenous amphotericin B. The pathogenesis, diagnosis and treatment of paranasal sinus mucormycosis is discussed.