• A 61-year-old man was seen for a long-standing, recurrent eczematous dermatitis that appeared only in the summer. A patch test with ammoniated mercury was positive. Photopatch reactions to caine mix and paraphenylenediamine were positive, and phototesting disclosed an idiopathic photosensitivity to UV-A. Avoidance of sunlight exposure and the use of chemical sunscreening agents prevented further recurrence of the dermatitis.
(Arch Dermatol 1984;120:1488-1490)
LeVine MJ. Idiopathic Photodermatitis With a Positive Paraphenylenediamine Photopatch Test. Arch Dermatol. 1984;120(11):1488-1490. doi:10.1001/archderm.1984.01650470094021