DEMYELINATING DISEASES are groups of diseases where some clinical and pathological features are found to be common. The most important change is loss of myelin sheath with minimal or no damage to the axis cylinder. The nature of these diseases is uncertain. The diseases included in this group are:
1. Acute disseminated encephalomyelitis.
2. Acute haemorrhagic leucoencephalomyelitis.
3. Multiple sclerosis.
4. Acute transverse Myelopathy.
5. Neuromyelitis optica.
6. Diffuse cerebral sclerosis.
7. Myelopathies in AIDS.
8. Myelopathy of human T cell leukaemia virus infection.