Late-onset hydroa vacciniforme: two case reports.

Hydroa vacciniforme (HV) is a rare blistering photodermatosis that heals with vacciniform scarring, with onset usually in childhood and spontaneous resolution by early adulthood. We report two cases of HV seen at the National Skin Centre, Singapore, both with a late onset at 20 years of age, during compulsory military service, and one with a less typical non-vesicular presentation, that initially caused some diagnostic difficulties.