Physicians often use the term lesion to indicate focal tissue damage in some part of the body. MS symptoms that neurologists are "tuned into" are the consequence of inflammation in the nervous system. Inflammation occurs in spots that are scattered in the brain and spinal cord that are called plaques. If these are large enough, they usually show up in brain or spinal cord magnetic resonance imaging (MRI) scans.
Lesion localized area of tissue damage.
Immune system the host defense against infection comprised of the white blood cells circulating in the blood and other tissues (including the bone marrow), lymph nodes, and the thymus.
Inflammation the accumulation of fluid, plasma proteins, and white blood cells initiated by physical injury, infection, or local immune response. Plaque the plate-like hardened areas of myelin damage and scarring in MS located in the brain and spinal cord. Magnetic resonance imaging (MRI) imaging of the brain obtained by the use of magnetic fields and radio frequency together with computerized tomography
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