'Central Nervous System Neuropathy': Know the symptoms, get an accurate diagnosis, and get timely treatment!

Know and Recognize Symptoms for Correct and Timely Treatment 

Central Nervous System Demyelinating Diseases(Central Nervous System Demyelinating Diseases) are a group of diseases caused by immune system abnormalities that damage the myelin sheath (Myelin Sheath) in the brain, spinal cord, or optic nerves, resulting in abnormal nerve signal transmission and various symptoms depending on the location of inflammation. 

There are 2 common diseases in this group: 

• Multiple Sclerosis (MS)

This disease is caused by immune system abnormalities that damage the myelin sheath in the brain and spinal cord, resulting in abnormal nerve signal transmission. Patients often experience blurred vision or vision loss due to optic neuritis, double vision, weakness or numbness in one limb or area, unsteady gait or loss of balance, easy fatigue, muscle stiffness, and may have speech difficulties or swallowing problems. Symptoms may occur in episodes and relapse throughout life. 

• Neuromyelitis Optica (NMO)

This is an inflammatory disease of the central nervous system caused by the immune system attacking the optic nerves and spinal cord. Patients often experience sudden blurred vision or vision loss, weakness or numbness in limbs due to spinal cord inflammation, loss of bladder and bowel control, and may have pain or muscle stiffness. Symptoms are often severe from the first episode and have a chance of recurrence. 

Although both diseases have similar symptoms, they have different causes, disease mechanisms, and treatment methods. Therefore, accurate diagnosis is crucial for proper long-term treatment planning. 

Symptoms to Watch For 

• Blurred vision or vision loss due to optic neuritis 
• Double vision 
• Unsteady gait, poor balance 
• Numbness or weakness in arms or legs, which may be localized, or extend from below the chest downwards, or from the hips downwards 
• Symptoms similar to stroke but develop more slowly (within 1–2 weeks, not within minutes or hours) 

Common Risk Groups 

Central nervous system demyelinating diseases can occur in people of all genders and ages but tend to be more common in certain populations as follows: 

• Multiple Sclerosis (MS)
  Mostly found in working-age adults between 20–40 years old, which is a period of physical strength and high social and work activity. It is more common in Europeans, Americans, and Middle Eastern populations. It is believed that genetic factors combined with environmental and climatic factors contribute to the disease. 

• Neuromyelitis Optica (NMO)
  Occurs in both young and elderly people but is more prevalent in Asian populations, especially East Asia and Southeast Asia. Risk factors may be related to genetics and an immune system sensitive to environmental triggers or certain infections. 

Diagnosis and Additional Tests for Central Nervous System Demyelinating Diseases 

Diagnosis of this group of diseases requires information from multiple sources, including symptom history, physical examination by a neurologist, and laboratory or imaging tests to differentiate from other conditions with similar symptoms, such as stroke or spinal cord compression.   

Important additional tests include 

• MRI (Magnetic Resonance Imaging) is the main test that helps visualize the location and characteristics of inflammation in the brain, spinal cord, and optic nerves in detail. It helps differentiate between MS and NMO, assess severity, and monitor treatment response. 
• Lumbar Puncture to detect markers of inflammation or immune system abnormalities in the central nervous system. 
• Blood Tests to detect specific immune markers such as antibodies against Aquaporin-4 (AQP4-IgG), which is associated with NMO. 
• Vision and Optic Nerve Tests to assess damage to the optic nerves from inflammation. 

Accurate diagnosis at an early stage is extremely important as it helps patients receive appropriate treatment, reduces the risk of disability, and allows effective disease monitoring. 

Treatment of Central Nervous System Demyelinating Diseases 

Treatment aims to reduce inflammation, control disease relapses, lessen symptom severity, and prevent long-term disability. The main approaches include 

1. Acute Attack Treatment 
   • Use high-dose intravenous corticosteroids to rapidly suppress nervous system inflammation. 
   • If there is no response to steroids, plasma exchange (Plasma Exchange: PLEX) may be considered to remove immune factors that damage the myelin sheath. 
2. Maintenance / Preventive Therapy 
   • Use immunosuppressants or immunomodulators such as Interferon-beta, Glatiramer acetate, or monoclonal antibody drugs. 
   • For NMO, specific drugs such as Rituximab, Eculizumab, or Satralizumab may be used to prevent recurrent inflammation. 
3. Rehabilitation 
   • Physical therapy and occupational therapy to restore muscle strength, improve movement balance, and help patients return to daily activities. 
   • Psychological care and adaptation support, such as psychological counseling. 
4. Monitoring and Evaluation 
   • Regular symptom monitoring and MRI imaging to assess treatment effectiveness and adjust treatment plans accordingly. 

Central nervous system demyelinating diseases require accurate diagnosis and continuous follow-up treatment. If you experience blurred vision, double vision, weakness, or numbness in parts of the body, you should promptly see a neurologist for examination and appropriate treatment planning. 

Because early detection and treatment are the key to preventing long-term disability 

Dr. Metha Apiwattanakul  

Neurologist and Brain Specialist  

Phyathai 2 Hospital