One hundred four psoriatic patients who had 8-methoxypsoralen-ultraviolet light A (PUVA) treatment between 1975-1987 were investigated to determine if skin cancer had ever occurred during or after the therapeutic period. Incidence data of skin cancer was applied to this group of patients to measure the expected number of patients with skin cancer. The significance of observed number versus expected of PUVA-treated patients with skin cancer was analyzed. The authors did not observe a significant increase of patients with skin cancer.
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Chuang et al. (1989) studied this question.
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