Lead Sponsor

Women's College Hospital

Collaborators

Age

18 - No limit years

Sex

ALL

Healthy Volunteers

No

•Age ≥18
•Able to provide an informed consent
•Meets the CASPAR criteria for PsA
•Early PsA - Less than 5 years from a rheumatologist diagnosis of PsA
•Dermatologist confirmed diagnosis of psoriasis
•No prior diagnosis of PsA or signs of PsA on physical examination
•Psoriasis Epidemiology Screening Tool (PEST) score \< 3
•Referred to rheumatology for musculoskeletal symptoms such as joint pain, stiffness, back pain
•No evidence of inflammatory rheumatic condition including rheumatoid arthritis, spondyloarthritis, systemic lupus erythematosus, scleroderma, gout, septic arthritis or recent joint trauma/surgery
•No psoriasis
•No inflammatory bowel disease

•Using any biologic medications including Tumor Necrosis Factor (TNF) inhibitors, Interleukin (IL)-17 inhibitors, IL-23 inhibitors, IL-12/23 inhibitors, Janus Kinase (JAK) inhibitors
•Prednisone ≥ 7.5 mg/day