Solar urticaria

Solar unicaria is a relatively rare immunoglobulin E-mediated photodermatosis that is caused by specific. yet diverse wavelengths of light. The history, epidemiology, clinical manifestations, histology, etiology/pathogenesis; differential diagnosis, treatment, course, and prognosis of solar urticaria are reviewed herein. (J Am Acad Dermatol 2008;59:909-20.)