Risk of melanoma with psoralen/ultraviolet A therapy for psoriasis. Do the known risks now outweigh the benefits?


Since the introduction in the 1970s of treatment with oral psoralens with longwave ultraviolet radiation in the A range (PUVA), there has been an increasing concern about the long term carcinogenic effect of the therapy. The main indication for PUVA is psoriasis, a common, chronic and intractable skin disease that affects 1 to 3% of the world's population… (More)


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