(A) Nasal endoscopy revealed pale insensate mucosa with necrotic tissue in the middle turbinate. M: middle turbinate; S: septum (B) Photomicrograph (Gomori methenamine silver stain, original magnification ×200) of left middle turbinate showed numerous hyphae invading vascular wall. The hyphae are relatively broad, appear septate (arrows), and have irregular contours. Rare branching is seen (white arrowhead) V: vessel. (C) Lactophenol cotton blue wet mount shows hyphae with septa but as the culture matured, zygospores formed each with a prominent beak and sporangiola, characteristic of Entomophthorales