The many faces of phytophotodermatitis.

Phytophotodermatitis is a common cutaneous phototoxic reaction produced by contact with a variety of plant substances, followed by sunlight exposure. Phytophotodermatits can simulate child abuse, impetigo, superficial lymphangitis, and larva migrans. The most frequent presentation is hyperpigmentation of the dorsum of the hands, but there are other less common findings such as blisters or lesions mimicking solar lentigines and melasma.