Psoriasis patients who also have major depressive disorder (MDD) might be at risk of developing psoriatic arthritis, compared with psoriasis patients without MDD, according to findings published in the Journal of Investigative Dermatology (Apr. 2017; 137(4):828–835). “For many years, the rheumatology and dermatology communities have been trying to understand which patients with psoriasis go on to develop psoriatic arthritis and how we might detect it earlier in the disease co