[Isolated unilateral hypoglossal nerve paralysis in carotid dissection].

A 41-year-old man presented with a unilateral atrophy and paresis of his tongue which were not explained by any pathological finding in the brainstem or at the base of the skull. The diagnosis of right internal carotid artery dissection was suggested by magnetic resonance imaging and ultrasound examination and confirmed by arterial angiography. During anticoagulant therapy clinical recovery and angiographical improvement occurred.