@ropnrose you do not need a positive biopsy for GCA. This is a clinical diagnosis. If you are on prednisone, it eventually should be tapered and you should be converted to a biological (Actmera). You also need to see a retinologist to evaluate your eye and a dexascan depending on how long you have been on prednisone. GCA is an autoimmune disease that can last up to two years. You are lucky that you got to see a rheumatologist quickly.