Diffusion Weighted Imaging in Acute Ischemic Posterior Optic Neuropathy

Rhinocerebral Mucormycosis Axial DWI and ADC images show restricted diffusion involving the intraorbital segment of left optic nerve consistent with acute infarction and large left MCA territory infarct. 3 D TOF MRA showed diffuse narrowing of the intracranial left ICA with complete occlusion of left MCA and its cortical branches. Enhancing soft tissue was seen in the left maxillary and fronto-ethmoid sinuses with extension of inflammation in the retro orbital fat, bulky extraocular muscles suggesting sinus and orbital cellulitis.