Giant cell arteritis (GCA) is a rare disease and the commonest of the vasculitides. Given the risk of sight loss, it is also a rheumatological emergency. The 1990 American College… Click to show full abstract
Giant cell arteritis (GCA) is a rare disease and the commonest of the vasculitides. Given the risk of sight loss, it is also a rheumatological emergency. The 1990 American College of Rheumatology (ACR) classification guidelines[1][1] are often used as a guide to diagnosis, with an emphasis on age,
               
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