(By Dr. Bhavya Saxena, Consultant Pathologist, Global Reference Laboratory, Metropolis Healthcare Limited) Multiple Sclerosis (MS) is an autoimmune condition which damages the protective myelin sheath that covers the nerves. It primarily affects the central nervous system including the brain, spinal cord, and optic nerves.

In India, this disease was recognized in the 1960s when some physicians who received training in Neurology in the West, returned to India and identified. Approximately, 2.9 million people are affected and are living with it worldwide, mostly affecting individuals between 20 to 40 years.

Women are affected more as compared to men, with the ratio being 2:1, as per some studies. Causes Of Multiple Sclerosis: While the aetiology of MS is still unclear, some suggest inflammation of the white and grey matter in the CNS due to focal immune cell infiltration and their cytokine by a breach in the blood-brain barrier are the cause of the formation of plaques in MS. Certain environmental factors, including exposure to some viral and bacterial agents like Epstein Barr virus, human herpes virus type 6, and mycoplasma pneumonia could be the possible cause.

Whereas smoking (soluble gas such as nitric oxide and carbon monoxide can damage neurons and oligodendrocytes), vitamin deficiency (especially vitamins D and B12), diet (negative association between MS risk and high fish intake), and exposure to UV radiation are also linked with the onset of MS. Genetic factors are als.