&Psoriatic Arthritis=Psoriatic arthritis is an inflammatory arthritis associated with psoriasis. Several clinical patterns of joint involvement in psoriatic arthritis have been identified: Distal arthritis, characterized by involvement of the distal interphalangeal (DIP) joints; Asymmetric oligoarthritis in which less than five small and/or large joints are affected in an asymmetric distribution; Symmetric polyarthritis, similar and at times indistinguishable from rheumatoid arthritis (RA); Arthritis mutilans, characterized by deforming and destructive arthritis; Spondyloarthropathy, including both sacroiliitis and spondylitis.