Canadian Medical Guide > Diseases > Nervous System Diseases > Autoimmune Diseases of the Nervous System > Demyelinating Autoimmune Diseases, CNS > Encephalomyelitis, Acute Disseminated Terms and Definitions

Encephalomyelitis, Acute Disseminated

Medical Definition:	An acute or subacute inflammatory process of the CENTRAL NERVOUS SYSTEM characterized histologically by multiple foci of perivascular demyelination. Symptom onset usually occurs several days after an acute viral infection or immunization, but it may coincide with the onset of infection or rarely no antecedent event can be identified. Clinical manifestations include CONFUSION, somnolence, FEVER, nuchal rigidity, and involuntary movements. The illness may progress to COMA and eventually be fatal. (Adams et al., Principles of Neurology, 6th ed, p921)
Guide Notes:	when post-vaccinal (note X ref) coord IM with vaccine source if pertinent (IM or NIM); for post-vaccinal or postinfectious inflammation of the spinal cord only, use MYELITIS, TRANSVERSE; DF: ENCEPH ACUTE DISSEM
Also Called:	Encephalitis, Post-Vaccinal,Encephalomyelitis, Postexanthem,Postinfectious Encephalomyelitis

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