Acute necrosis of the corpus callosum

A 58-year-old man with a history of alcohol use disorder was admitted for apathy, confusion and aphasia of abrupt onset. In addition, clinical examination revealed a tetrapyramidal syndrome. Blood analyses showed macrocytosis, mildly elevated liver transaminase levels and hypoalbuminemia. Toxicological screening for ethanol, opiates, cannabinoids, amphetamines, cocaine, and methadone were negative. A brain magnetic resonance imaging (MRI) was performed and showed bilateral cytotoxic lesions involving the splenium of the corpus callosum depicted by T2/fluid attenuated inversion recovery (FLAIR)-weighted hyperintensities (panel A) with restricted diffusion (hypersignal on b1000 diffusion-weighted sequences and hyposignal on apparent diffusion coefficient map, panels B and C respectively) (Fig. 1).