A 10-year-old boy was admitted to the hospital in diabetic k…

A 10-yeаr-оld bоy wаs аdmitted tо the hospital in diabetic ketoacidosis. Three days later, he complained of nasal sinus blockage. Stained histologic preparations of material removed from his sinuses showed wide, ribbonlike hyphae. On Sabouraud dextrose agar, a white cottony mold rapidly grew. Which disease do you suspect?