Abstract
A 43-year-old white man developed a shallow erosion of a psoriatic plaque after chronic administration of methotrexate. This unusual cutaneous sign may be the first sign of methotrexate toxicity.
MeSH terms
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Adult
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Humans
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Male
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Methotrexate / adverse effects*
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Methotrexate / therapeutic use
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Psoriasis / drug therapy*
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Psoriasis / pathology
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Skin Ulcer / chemically induced*
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Skin Ulcer / pathology