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Cutaneous carcinoma in psoriatic patients treated with PUVA

Eight of 216 psoriatic patients treated at The London Hospital with photochemotherapy (PUVA) have developed a total of twenty‐five skin carcinomata. The type and site of tumour are discussed with special reference to the importance of PUVA compared with other risk factors. We suggest that a history of previous skin carcinoma, arsenic therapy or radiotherapy are relative contra‐indications to PUVA therapy for psoriasis.