A 71-year-old woman with dermatitis herpetiformis (DH) was treated with dapsone and developed a phototoxic dermatitis. Subsequently, lesions that were consistent with discoid lupus erythematosus (DLE) developed on the exposed skin. Immunofluorescent studies confirmed the presence of both DH and DLE in this patient.
Vandersteen PR, Jordon RE. Dermatitis Herpetiformis With Discoid Lupus Erythematosus: Occurrence of Sulfone-Induced Discoid Lupus Erythematosus. Arch Dermatol. 1974;110(1):95–98. doi:10.1001/archderm.1974.01630070059014
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