No one test established the diagnosis of ADEM.  Supporting features include an appropriate viral or vaccination history, an appropriate<unk>  neurologic illness, and consistent features on CNS imaging.
Acute disseminated encephalomyelitis differential diagnosis
Viral encephalitis differential diagnosis
Gliomatosis cerebri differential diagnosis
Japanese encephalitis differential diagnosis
Brain abscess differential diagnosis
Encephalopathy differential diagnosis
Bacterial meningitis differential diagnosis
St. Louis encephalitis differential diagnosis