FIG 1. Axial CT image through the skull base. A 5-mm-section using a standard soft-tissue algorithm and bone windowing shows mucosal thickening in the sphenoid sinuses, focal bony destruction of the right lateral sphenoid sinus wall (white arrowheads), and subtle lytic foci in the clivus (black arrowheads).
FIG 2. Photomicrograph of the sphenoid sinus wall reveals broad hollow-appearing hyphae with 90° branching (arrowheads at 90° to each other) characteristic of mucormycosis. A large necrotic bone fragment is seen centrally (methanamine silver stain, original magnification x400)
