Vasanop VachiramonPenpun WattanakraiMahidol University2018-06-212018-06-212005-09-01Dermatitis. Vol.16, No.3 (2005), 136-138171035682-s2.0-33645100229https://repository.li.mahidol.ac.th/handle/123456789/16821A 49-year-old woman presented with asymptomatic progressive erythema, hyperpigmentation, atrophy, and telangiectasia on her neck. The clinical appearance and histopathology of the skin lesion was consistent with poikiloderma of Civatte. Photopatch-testing with our standard photoallergens yielded a positive reaction to 6-methylcoumarin, which was found in the patient's perfume. This report describes the first case in which photoallergic contact sensitization to 6-methylcoumarin may play an important role in the pathogenesis of poikiloderma of Civatte.Mahidol UniversityMedicineArticleSCOPUS10.2310/6620.2005.05002