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MOG-Antibody Disease (MOGAD)

Inflammatory CNS demyelinating disorder mediated by antibodies against myelin oligodendrocyte glycoprotein

Written by: Saygı Hospital Health Guide Editorial Board
Last updated:

This content has been compiled by the Saygı Hospital Health Guide Editorial Board and is periodically reviewed by a specialist physician.

References (5)

This content is for informational purposes only and does not constitute medical advice. You can book an appointment at our Nöroloji department. Book Appointment →

What is MOG-Antibody Disease (MOGAD)?

MOGAD is mediated by antibodies against myelin oligodendrocyte glycoprotein (MOG), a protein on outer myelin surface.

Distinct from MS and AQP4-IgG NMOSD - separate diagnostic criteria (Banwell 2023).

Affects all ages, with bimodal distribution: pediatric (most common ADEM cause) and adult.

Clinical phenotypes: optic neuritis (often bilateral), transverse myelitis (often longitudinally extensive), ADEM, brainstem syndromes, cortical encephalitis.

MRI features: bilateral optic nerve enhancement (long segments), longitudinally extensive cord lesions, fluffy white matter lesions, leptomeningeal enhancement.

Often relapsing course (40-50 percent), but monophasic in many.

Symptoms

Optic neuritis: vision loss, painful eye movements, color desaturation; often bilateral and severe in MOGAD.
Transverse myelitis: limb weakness, sensory loss, bowel/bladder dysfunction, gait disturbance.
ADEM (acute disseminated encephalomyelitis): encephalopathy, multifocal neurologic deficits, often after viral illness.
Brainstem syndromes: diplopia, dysphagia, dysarthria, ataxia, intractable hiccups/vomiting.
Cortical encephalitis: seizures, headache, focal deficits, altered mental status.
Recovery often better than NMOSD or MS, but residual deficits common with severe attacks.

Risk Factors

Pediatric onset more common than NMOSD or MS in this age.
Recent viral infection or vaccination preceding onset (especially ADEM).
No definite HLA association established.
Female-to-male ratio approximately equal in adults.
No clear environmental or geographic risk factors.
MOG antibody positivity may be transient in monophasic disease.

When to See a Doctor?

If you experience any of the following symptoms, seek medical attention promptly:

  • Acute vision loss, especially bilateral or with eye pain.
  • New onset limb weakness with sensory level - urgent evaluation.
  • Encephalopathy with multifocal neurologic deficits, especially in children post-infection.
  • Suspected NMOSD (NMO spectrum disorder) - test both AQP4-IgG and MOG-IgG.
  • Recurrent demyelinating events not meeting MS criteria.
  • Atypical optic neuritis with severe vision loss, bilateral involvement.

Treatment Methods

01
Acute attack: high-dose IV methylprednisolone 1 g daily x 5 days; followed by oral prednisone taper.
02
Plasma exchange or IVIG for steroid-refractory or severe attacks.
03
Diagnostic workup: live cell-based assay for MOG-IgG (serum), AQP4-IgG to exclude NMOSD, MRI brain/orbits/spine, CSF (oligoclonal bands typically negative).
04
Long-term immunotherapy for relapsing disease: rituximab, mycophenolate mofetil, azathioprine.
05
IVIG maintenance therapy increasingly used, especially in pediatric MOGAD.
06
Avoid MS-specific therapies (interferons, fingolimod, natalizumab) - may worsen MOGAD.
07
Symptomatic management: spasticity (baclofen), neuropathic pain, bladder dysfunction.
08
Multidisciplinary care: neurology, ophthalmology, rehabilitation, psychology.

Which Department to Visit?

You can visit our Nöroloji department for these complaints. Our specialist physicians will create the most suitable treatment plan for you.

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Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.