Acute disseminated encephalomyelitis

Acute disseminated encephalomyelitis (ADEM), also known as post-infectious encephalomyelitis or post-vaccination encephalomyelitis, is a demyelinating disease within the central nervous system caused by immune dysfunction following acute exanthematous diseases such as measles, rubella, varicella, or smallpox, or after immunization. Viral infection or immunization typically serves as the direct cause or precipitating factor for this condition.