Marchiafava-Bignami disease: Prompt diagnosis made by magnetic resonance brain imaging.

Key Clinical Message: Marchiafava-Bignami disease, a rare condition often associated with alcoholism, shows myelin degeneration with tissue necrosis specifically in the corpus callosum. Urgent application of magnetic resonance imaging could lead to prompt diagnosis.

Abstract: A 66-year-old male with habitual alcohol drink complained acute deterioration of left-side muscle weakness as initial presentation.