title: Erythema multiforme on exposed and non-exposed skin following polymorphic light eruption: a case report.
abstract: We report a 35-year-old caucasian female with a history of polymorphic light eruption (PLE) who, after the outbreak of pruritic papules following the first sun exposure of the year, developed target lesions in two different bouts, the first on sun-exposed skin and the second on sun-protected sites. A diagnosis of erythema multiforme (EM) developing as a result of PLE was made. As far as we were able to search in the literature, EM occurring in two bouts has not been described previously. We discuss the differential diagnosis.
authors.affiliation: Clínica Universitária de Dermatologia, Hospital de Santa Maria, Lisboa, Portugal. joaobc77@hotmail.com
authors.forename: João
authors.initials: J
authors.lastname: Borges da Costa
authors.forename: Miguel
authors.initials: M
authors.lastname: Duarte Reis
authors.forename: Luís
authors.initials: L
authors.lastname: Soares de Almeida
authors.forename: Augusto
authors.initials: A
authors.lastname: Mayer-da-Silva
authors.forename: Manuel
authors.initials: M
authors.lastname: Marques Gomes
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D004892:Erythema Multiforme / Q000209:etiology* / Q000473:pathology; D005260:Female; D006801:Humans; D010787:Photosensitivity Disorders / Q000150:complications*; D012867:Skin / Q000473:pathology; D012882:Skin Tests; D013472:Sunlight / Q000009:adverse effects*