Longitudinally extensive transverse myelitis (LETM)

A neurological condition characterized by by a contiguous inflammatory lesionIn relation to MOGAD, an area of damage or scarring in the central nervous system. It is caused by inflammation that results from the immune system attacking the myelin sheath around nerves. Lesions can be found on the brain, spine, or optic nerves. of the spinal cord. LETM is often associated with the autoimmuneA disease in which the immune system incorrectly targets and attacks an individual's own healthy cells. central nervous systemNerve tissue that resides in and composes the brain, spinal cord, and optic nerve disease neuromyeltis optica (NMO) and MOGADOften referred to as MOGAD, Anti-MOG, MOG Ab+, MOG Antibody Disease, MOG Associated Antibody Disease, MOG positive disease   but rarely with Multiple Sclerosis (MS)An autoimmune disease that attacks healthy cells in the myelin, the protective sheath that surrounds nerves in the central nervous system (CNS) leading to neurological symptoms originating from the brain, spinal cord, and/or optic nerve..