We describe a case of noninvasive sinusitis caused by Paecilomyces lil
acinus in a patient with diabetes mellitus. Cure was achieved by endos
copic drainage and aspiration of the fungal mass. We discuss the diffi
culty in and clinical importance of distinguishing Paecilomyces from A
spergillus, Pseudallescheria, a Zygomycete, or other molds.