Introduction: Acute Disseminated Encephalomyelitis (ADEM) is an autoimmune demyelinating disease of the central nervous system´s white matter; it usually has a monophasic course with an idiopathic cause or following infection or immunization processes.
Objective: This article has the purpose to present a clinical case with selective involvement of brainstem. We describe a 28 year old woman who developed ADEM. Her clinical presentation, neuroradiological findings and treatment are reported.
Conclusions: ADEM is an infrequent disease which can be fatal. MRI findings confirm the diagnosis and steroid therapy appears to be the most effective treatment, although the disease may spontaneously improve.
