[Early cerebral vascular accidents in treated Horton's disease. Responsibility of the corticoid treatment?].

Two cases of strokes in the vertebrobasilar territory were observed in patients with Horton's disease during the first week of treatment when the inflammatory process seemed clinically and biologically under control. The mechanisms of arterial ischaemia are discussed: specific localisation of giant cell arteritis, associated atherosclerosis, failure of therapy or a possible inducing role of steroid therapy as the chronology of these cases would suggest.