Multiple sclerosis

Multiple sclerosis (MS) is the most common demyelinating disease of the central nervous system. There are multiple inflammatory demyelinating spots in the white matter of the central nervous system in the acute active stage of the disease, and the old lesions form calcified spots due to glial fiber hyperplasia. It is characterized by multiple lesions, remission and recurrence. It mainly occurs in the optic nerve, spinal cord and brain stem, mostly in young and middle-aged people, and it is more common in women than in men.