A 52-year-old man with Fitzpatrick type V skin presented for evaluation of a photodistributed eruption of unknown origin. The patient reported a 20-year history of the dermatitis, with worsening severity during the past 6 years. He had required one hospital admission with intravenous
BACKGROUND
An extract of the tropical fern Polypodium leucotomos (PL) administered orally to mice inhibits ultraviolet B (UVB) radiation-induced skin cancer formation. UVB-induced murine skin cancers occur, in part, because of UVB-induced immunosuppression. Thus, we examined whether PL inhibits
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