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June 1981

Polymorphic Light EruptionExacerbation From Photocopier Exposure

Author Affiliations

From the Department of Dermatology, University Hospitals of Cleveland.

Arch Dermatol. 1981;117(6):373-374. doi:10.1001/archderm.1981.01650060063029

Polymorphic light eruption (PMLE) is a chronic photodermatosis that may be acquired or hereditary1,2 and has a slight propensity for women. Generally, the lesions (which may be papules, plaques, or vesicles), are confined to sun-exposed areas, although they occasionally appear on nonexposed sites. The activating wavelengths seem always to include middle wavelength ultraviolet (UV) radiation (UV-B, 290 to 320 nm)3 and, on occasion, long wavelength UV radiation (UV-A, 320 to 400 nm).4,5 The case reported herein offers further evidence that the lesions of PMLE may be provoked by naturally occurring or artificially produced UV-A.

Report of a Case  A 42-year-old woman (who took no medication) had a 16-year history of photosensitivity. Four to six hours after exposure to sunlight for ten minutes, pruritic, erythematous papules developed on all exposed areas. The lesions appeared even when she was exposed to sunlight through window glass and remained for approximately

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