Psoriatic arthritis (PsA) is an inflammatory arthritis that causes joint swelling, pain, and stiffness. It's linked to psoriasis, a skin condition causing inflamed, scaly patches on the skin.

Johnson & Johnson (NYSE:JNJ) on Friday announced topline results from Phase 3b APEX study of Tremfya (guselkumab) in patients with active psoriatic arthritis (PsA) who are biologic naïve and have ...