Aspergillus terreus causing invasive pulmonary aspergillosis with air-crescent sign

Aspergillus terreus is an uncommon cause of human disease. A patient with acute myelomonocytic leukemia is described who developed an invasive pulmonary infection with A terreus characterized by an air-crescent sign on chest roentgenogram. Previous reports of A terreus infections and the pathogenesis and significance of an air-crescent sign in invasive pulmonary aspergillosis are reviewed.