From: MOG encephalomyelitis: international recommendations on diagnosis and antibody testing
1. Monophasic or relapsing acute optic neuritis, myelitis, brainstem encephalitis, encephalitis, or any combination thereof, and 2. radiological or, only in patients with a history of optic neuritis, electrophysiological (VEP) findings compatible with CNS demyelination, and 3. at least one of the following findings: MRI a. Longitudinally extensive spinal cord lesion (≥3 VS, contiguous) on MRI (so-called LETM)a,b b. Longitudinally extensive spinal cord atrophy (≥3 VS, contiguous) on MRI in patients with a history compatible with acute myelitisa c. Conus medullaris lesions, especially if present at onsetc d. Longitudinally extensive optic nerve lesion (e.g., >1/2 of the length of the pre-chiasmal optic nerve, T2 or T1/Gd)d e. Perioptic Gd enhancement during acute ONe f. Normal supratentorial MRI in patients with acute ON, myelitis and/or brainstem encephalitis g. Brain MRI abnormal but no lesion adjacent to a lateral ventricle that is ovoid/round or associated with an inferior temporal lobe lesion and no Dawson’s finger-type or juxtacortical U fiber lesion (Matthews-Jurynczyk criteriaf) h. Large, confluent T2 brain lesions suggestive of ADEM Fundoscopy i. Prominent papilledema/papillitis/optic disc swelling during acute ON CSF j. Neutrophilic CSF pleocytosisg or CSF WCC > 50/μlh k. No CSF-restricted OCB as detected by IEF at first or any follow-up examinationi (applies to continental European patients only) Histopathology l. Primary demyelination with intralesional complement and IgG deposits m. Previous diagnosis of “pattern II MS” j Clinical findings n. Simultaneous bilateral acute ON o. Unusually high ON frequency or disease mainly characterized by recurrent ON p. Particularly severe visual deficit/blindness in one or both eyes during or after acute ON q. Particularly severe or frequent episodes of acute myelitis or brainstem encephalitis r. Permanent sphincter and/or erectile disorder after myelitis s. Patients diagnosed with “ADEM”, “recurrent ADEM”, “multiphasic ADEM” or “ADEM-ON” t. Acute respiratory insufficiency, disturbance of consciousness, behavioral changes, or epileptic seizures (radiological signs of demyelination required) u. Disease started within 4 days to ~ 4 weeks after vaccination v. Otherwise unexplained intractable nausea and vomiting or intractable hiccups (compatible with area postrema syndrome)a w. Co-existing teratoma or NMDAR encephalitis (low evidencek) Treatment response x. Frequent flare-ups after IVMP, or steroid-dependent symptomsl (including CRION) y. Clear increase in relapse rate following treatment with IFN-beta or natalizumab in patients diagnosed with MS (low evidence) |