HORNERS-SYNDROME DUE TO GIANT-CELL ARTERITIS

We present one of the few documented cases of Horner's syndrome as a m anifestation of biopsy-proven giant-cell arteritis. An 84-year-old man with jaw claudication and slight elevation of ESR (erythrocyte sedime ntation rate) presented ptosis and left pupil miosis. A 1% phenylephri ne instillation produced dilatation of the affected pupil, suggesting postganglionic rather than preganglionic involvement. Temporal arterit is should be considered in an elderly patient with Horner's syndrome.