Definition: A type of inflammatory arthritis associated with PSORIASIS, often involving the axial joints and the peripheral terminal interphalangeal joints. It is characterized by the presence of HLA-B27-associated SPONDYLARTHROPATHY, and the absence of rheumatoid factor.
Other names Psoriasis, Arthritic; Psoriasis Arthropathica; Psoriatic Arthritis; Arthritic Psoriasis