Wild parsnip (Pastinaca sativa) is known to produce photodermatitis although few cases have been reported. Important prerequisites are moist skin from water or sweat, contact with the plant in spring or summer, and exposure to sunlight. The plant generally produces bulla, and residual pigmentation may be present. Phytochemical studies have shown the presence of several furocoumarins which, with UVA exposure, are necessary for the development of dermatitis. We report a case of dermatitis to Pastinaca sativa subsp. urens (Req. ex Godron) Celak, not correlated with UVA activation. A possible irritant response to the leaves, the positive ethanolic extract, and the positive photopatch test to a purified fraction, suggests 3 different pathogenetic mechanisms: irritant, allergic and UVB photoallergic.
|Number of pages||2|
|Publication status||Published - 1986|
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