[Complicated Horton's syndrome: therapeutic modalities].

FORMS THAT RAISE THERAPEUTIC PROBLEMS: The complicated forms of Horton's syndrome regroup various situations: ocular involvement at the start, large vein involvement, corticosteroid resistance (rare), corticosteroid dependence preventing the reduction in the daily dose of prednisone to less than 15 mg, high rate of morbidity with prolonged corticosteroid therapy. GENERAL PRINCIPLES: The ocular forms and those with large vein involvement, require a minimal attack treatment with 1mg/kg/d of prednisone. Cortisone assaults are often prescribed despite the fact that their efficacy remains to be demonstrated. Curative treatment with heparin (calcic or of low molecular weight) should be prescribed for 5 to 7 days with later relay to a platelet anti-aggregant, without any randomised study having validated this proposition. THE CASE OF CORTICOSTEROID-DEPENDENCE: The iatrogenic risk of corticosteroids is high and alternative treatments should be proposed: azathioprine, methotrexate, dapsone or hydroxychloroquine. Osteoporosis is the most frequent complication of corticosteroid therapy and must be avoided by the administration of a biphosphonate.