Polymorphic Light Eruption

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Abstract
Polymorphic light eruption (PMLE) is a chronic photodermatosis that may be acquired or hereditary1,2and 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)3and, on occasion, long wavelength UV radiation (UV-A, 320 to 400 nm).4,5The 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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