When should MOG-Ab be tested in patients with suspected autoimmune encephalitis with seizures and normal MRI?
In light of how MOG-Ab is excluded on panels like Mayo ENS2
Answer from: at Academic Institution
In my opinion it should be tested. MOGAD phenotype is expanding. I have recently seen a MOG Ab+ case presenting with encephalitis, seizure and normal MRI, abnormal PET brain.
In someone with suspected autoimmune encephalitis with seizures and a normal MRI (presuming done with gadolinium and the optic nerves are well visualized) I would not obtain MOG. MOG testing would have a very low pretest probability (so low that a positive test might well be a false positive). If on...