Pityriasis rosea is a common papulosquamous disorder with occasional variations in lesion morphology, distribution, number and course of disease. The lesions are classically arranged with their long axes parallel to the Langer`s lines of cleavage and typically affect the trunk and the proximal extremities. Variations in the distribution of pityriasis rosea include inversus, localized, and unilateral forms. The unilateral form is a very rare variant of pityriasis rosea, particularly in children. We report a 15-year-old boy with pityriasis rosea demonstrating unilateral localization.

Keywords: atypical, pityriasis rosea, unilateral pityriasis rosea