How well a new medication works for joint disease linked to psoriasis

This study is observing how guselkumab works for people with psoriatic arthritis — a condition where the joints become inflamed in people who also have psoriasis. Researchers will use ultrasound imaging and your medical records to see if this medication reduces inflammation in your joints and improves your symptoms. You won't be given the medication as part of this study; instead, you'll take it as your normal treatment, and doctors will simply track your progress.

Psoriatic arthritis can cause lasting joint damage if not treated well. This study wants to understand how effective this medication is in real-world practice — outside of a controlled laboratory setting — so doctors can better help patients like you manage this disease.