Definition Psoriasis is a common inflammatory scaling dermatosis with a bilateral symmetric distribution that may be associated with a seronegative spondyloarthropathy. It affects about 2% of the world’s population with no gender preference. Up to one-third of patients develop psoriatic arthritis (PSA). The mean age of onset of psoriasis is about 30 years with a possible range from birth to senescence. We have also observed in the clinic that the extent and severity of psoriasis increases with age. In the US, primary care physicians initially see about 60% of the estimated 150,000 new cases of psoriasis each year, but dermatologists encounter 80% of over 3 million office and hospital visits per year (1).
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Psoriasis Associated with Plaquenil (Hydroxychloroquine)