Psoriatic arthritis is a common inflammatory arthritis associated with psoriasis, occurring in 5% to 40% of patients with cutaneous disease. Recently, there has been an increased appreciation of the need to use an integrated approach to these 2 diseases, considering both entities when determining therapeutic choices. In this review, the available therapeutic options for psoriatic arthritis are considered, along with the potential benefit that these medications may have for cutaneous psoriasis. Finally, a conceptual model for the therapy of psoriasis and psoriatic arthritis, the Four Quadrant Model, is presented as a simplified framework to use when considering treatment for psoriatic disease.
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