18 F-FAZA, 18 F-FDG, and 123 I-IMP Imaging Reveal Hypoxia and Metabolism in Acute MOGAD.

We report the first case of myelin oligodendrocyte glycoprotein antibody-associated disease (MOGAD) evaluated with hypoxic imaging using 18 F-FAZA PET/CT. A healthy woman in her 20s presented to our hospital with seizures, headaches, and vomiting. MRI and CT scans suggested a wide range of differential diagnoses, from neoplastic lesions, such as malignant lymphoma, to inflammatory diseases, such as vasculitis, making her case challenging to diagnose. MOGAD was confirmed by positive myelin oligodendrocyte glycoprotein antibodies, and her condition improved with steroid therapy. The 18 F-FAZA PET/CT findings in this case may aid in understanding the pathogenesis of MOGAD.