Which disease is described as chronic, progressive degeneration with autoimmune/inflammatory involvement of the nervous system?

• A. Multiple Sclerosis
• B. Parkinson's Disease
• C. Amyotrophic Lateral Sclerosis
• D. Myasthenia Gravis

Answer: (A)

Chronic autoimmune inflammatory demyelination of the central nervous system is the hallmark here. In this disease, the immune system attacks the myelin sheaths surrounding neurons in the brain and spinal cord, leading to focal areas of demyelination (plaque formation) and disrupted nerve conduction. The course often spans years and can be relapsing-remitting or progressive, with symptoms that vary depending on where the plaques form—optic neuritis causing vision changes, sensory and motor changes, or coordination and gait problems being common manifestations. MRI typically shows scattered white-matter plaques, especially around the ventricles, and CSF may reveal oligoclonal bands, supporting an inflammatory demyelinating process.

This fits best because the other conditions are driven by different mechanisms: Parkinson’s disease is a neurodegenerative loss of dopaminergic neurons in the substantia nigra, mainly producing movement symptoms rather than autoimmune CNS inflammation; amyotrophic lateral sclerosis involves progressive degeneration of upper and lower motor neurons; myasthenia gravis is an autoimmune attack at the neuromuscular junction affecting peripheral nerve signaling rather than CNS demyelination.