Why do I have sudden vision loss, leg weakness, and nausea?

Question

Hi doctor,

I experienced sudden, severe vision loss in my left eye two months ago that caused me great concern, and although my vision partially returned, it is still not back to normal. A few weeks after that episode, I developed severe back pain followed by progressive weakness and numbness in both my legs that made walking extremely difficult.

I also had unexplained episodes of severe hiccups and nausea that lasted for several days, which seemed very strange. My brain and spine MRI showed abnormalities in multiple areas, but my regular MS medications do not seem to be helping.

Could these neurological symptoms indicate a rare autoimmune condition, and what specialized tests and treatments are available for this condition?

Please help.

Thank you.

Answer 1

Hi,

Welcome to icliniq.com.

I have gone through your query and understand your concern.

The symptoms you described, sudden vision loss (optic neuritis), weakness and numbness in both legs (myelitis), and episodes of persistent hiccups and nausea, are highly suggestive of neuromyelitis optica spectrum disorder (NMOSD), a rare autoimmune disease that is distinct from multiple sclerosis (MS).

In NMOSD, the immune system mistakenly attacks a protein called aquaporin-4 on nerve cells, leading to inflammation mainly in the optic nerves and spinal cord, and sometimes the brainstem (which explains the hiccups and nausea).

The following investigations are recommended for confirmation:

Blood test for AQP4 antibody (aquaporin-4 IgG): Very specific for NMOSD. If negative, test for MOG antibody (myelin oligodendrocyte glycoprotein).
MRI (magnetic resonance imaging) of the brain and spinal cord: NMOSD lesions are usually longer and differ in pattern from those seen in MS.
Lumbar puncture (cerebrospinal fluid study): Helps in differentiating NMOSD from MS.

Treatment is directed at managing acute attacks and preventing relapses:

Acute attacks: High-dose intravenous (IV) steroids followed by plasma exchange (plasmapheresis) if recovery is incomplete.
Long-term prevention: Medications that suppress the immune system to prevent relapses, such as:

Rituximab (anti-B-cell therapy).
Azathioprine or Mycophenolate mofetil (MMF).
Newer biologics like Eculizumab, Inebilizumab, or Satralizumab are highly effective and safer for long-term use.

With early diagnosis and proper preventive treatment, most patients regain good function, and relapses can largely be prevented. Some helpful lifestyle measures include avoiding overheating, infections, and stress, maintaining good hydration and nutrition, and keeping regular follow-ups to monitor vision and mobility. Your case deserves evaluation by a neurologist experienced in demyelinating diseases, as early diagnosis and treatment are crucial to prevent permanent disability.

I hope this helps you.

Thank you.