[Vasculitis course of neuroborreliosis with thalamic infarct].

A-20-year-old man without vascular risk factors presented with paraesthesia of the left side of the body with acute onset. Cerebral magnetic resonance imaging showed an infarction in the right thalamus. Intra-arterial digital subtraction angiography revealed stenosis of the right thalamic vessels. Recent infection by Borrelia burgdorferi was demonstrated by typical findings in the cerebrospinal fluid: lymphocytic pleocytosis and intrathecal synthesis of borrelial-specific antibodies. The diagnosis of a borrelial-induced vasculitis with secondary thalamic infarction was made from these findings. After antibiotic treatment with cefrtriaxone, the patient was discharged without residual complaints.