A prospective follow-up study found that psoriatic arthritis patients with higher synovial immunohistochemical reactivity of IL-17A, DKK1, and TGF-β1 are more likely to benefit from early initiation of biologics. Psoriatic arthritis (PsA) is a chronic inflammatory disease affecting joints and skin in patients with psoriasis. It exhibits progressive and destructive joint changes, with significant pathological...