18F-Fluoromisonidazole PET in Myelin Oligodendrocyte Glycoprotein Antibody–Associated Disease Presenting With Tumefactive Demyelinating Lesion

Tumefactive demyelinating lesions have been appreciated as part of the clinical and radiological spectrum of myelin oligodendrocyte glycoprotein antibody-associated disease. A 63-year-old woman was followed up for myelin oligodendrocyte glycoprotein antibody-associated disease. Two years later, she presented with right facial paralysis. T2-weighted MRI scan demonstrated a high-signal-intensity area with edematous change in the right frontal...