title: A slowly enlarging, unilateral, erythematous macular lesion.
authors.affiliation: Hospital de Mataró, Barcelona, Spain.
authors.forename: Xavier Bigatà
authors.initials: XB
authors.lastname: Viscasillas
authors.forename: Gemma Sais
authors.initials: GS
authors.lastname: Puigdemont
authors.forename: Carme Admella
authors.initials: CA
authors.lastname: Salvador
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D004890:Erythema / Q000209:etiology / Q000473:pathology; D005260:Female; D006801:Humans; D013909:Thorax; D014582:Urticaria Pigmentosa / Q000150:complications / Q000175:diagnosis* / Q000473:pathology