Hydroa vacciniforme is a rare, chronic photosensitivity disorder manifested in childhood by recurrent vesicles that hea1 with srarring. We report a case of hydroa vacciniforme in which vesicles were induced with multiple exposures ta UVA. The clinical features and ap-propriate laboratory evaluation of hydroa vacciniforme are reviewed. (Ann Dermatol 8:(1) 70-72, 1996).