&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.