ABSTRACT Psoriatic arthritis (PsA) is a seronegative inflammatory arthropathy and usually associated with psoriasis. The prevalence of psoriasis is 2–3% of the general population, these third develop arthritis. PsA and psoriasis are diseases of unknown etiology, possibly with a multifactorial origin among which genetic, environmental and immunological.It is a systemic inflammatory disease that presents both clinical features as extra-articular joint. Clinical manifestations on locomotor not limited to the presence of arthritis, may also be enthesitis, dactylitis and axial involvement. Extraarticular manifestations include skin involvement, the eye and the effect on the intestine.In terms of diagnosis, there is no evidence that the enfermedad.Las diagnosed different techniques to assess the APs are plain radiography (RX), magnetic resonance imaging (MRI) and ultrasonography (ECO). PHC is classified within the family of spondyloarthritis. The classification criteria of PsA are CASPAR 2006.Axial forms are treated with NSAIDs and any failed with biologics (anti-TNF). In peripheral shapes recommended NSAIDs or DMARD plus or oral glucocorticoids as infiltrations and administering failure biological therapy.