title: Hydroa vacciniforme. Diagnosis by repetitive ultraviolet-A phototesting.
abstract: Hydroa vacciniforme is a rare disorder manifested in early childhood by recurrent photoinduced vesicles that heal with scarring. We report a case in which repetitive exposures to artificial ultraviolet light in the A range reproduced the clinical findings induced by natural sunlight. Phototesting may be viewed as an important diagnostic aid, as the induction of lesions clinically identical to hydroa vacciniforme can provide a reliable criterion for the diagnosis.
mesh_terms: D002648:Child; D006801:Humans; D006837:Hydroa Vacciniforme / Q000175:diagnosis* / Q000473:pathology; D008297:Male; D012867:Skin / Q000473:pathology; D012882:Skin Tests / Q000379:methods; D014466:Ultraviolet Rays