Solar urticaria with a wide action spectrum from UVB to visible light complicated with UVA-induced polymorphous light eruption.
Photodermatol Photoimmunol Photomed 2017 Feb 4. Epub 2017 Feb 4.
Department of Dermatology, Kansai Medical University, Osaka, Japan.
Solar urticaria and polymorphous light eruption (PLE) are acquired idiopathic photosensitivity disorders, but each phenomenon is extremely different; one is an immediate reaction, and one is a delayed-type reaction. Phototesting is necessary not only for the diagnosis of these photosensitivity disorders but also for the determination of the action spectrum so that the patient can try to avoid the triggering wavelengths in ordinary life. Solar urticaria is unique in that the particular spectra that inhibit or enhance the reactions by action spectra are present in some cases. Read More