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Magnetic resonance imaging shows acute invasive fungal sinusitis involving right ethmoid, sphenoid and maxillary sinuses with right orbital apex involvement (yellow arrows in 1a and 1b), optic nerve sheath inflammation (yellow arrow in 1c), partly necrotic right sphenoid sinus walls (dotted arrow in 1d), right cavernous sinus and right internal carotid artery thrombosis (red arrows in 1c and 1d) and an extra-axial collection in the middle cranial fossa (asterisk).
