Acute disseminated encephalomyelitis probably related to a Mycoplasma pneumoniae infection.

A 36-year-old woman was suffering from acute disseminated encephalomyelitis, which had been preceded by a febrile illness. Brain CT showed diffuse white matter hypo-attenuation. Electroencephalography initially revealed altered non-REM sleep followed by diffuse slowing. Brain stem auditory evoked potentials showed interwave delay, while pattern visual evoked potentials were normal. The patient made a full recovery and the CT scan and EEG normalized. Serological evidence of Mycoplasma pneumoniae was present.