Foix-Chavany-Marie syndrome due to unilateral anterior opercular infarction with leukoaraiosis.

Foix-Chavany-Marie syndrome (FCMS) is a cortical-subcortical pseudobulbar palsy characterized by automatic voluntary dissociation of facio-masticatory-pharyngo-glosso-laryngeal movements. FCMS is typically caused by vascular insults on the bilateral anterior opercular or adjacent subcortical areas. Acute onset of FCMS secondary to a unilateral lesion is extremely rare. Herein we present a case of FCMS caused by acute unilateral anterior opercular infarction with preexisting bilateral leukoaraiosis. Our case shows that an acute unilateral anterior opercular lesion can decompensate preexisting corticobulbar-subcortical lesions and cause the typical features of FCMS.