The clinical distinction between phototoxic and photoallergic contact dermatitis is difficult. Even a biopsy specimen from such a dermatitis rarely provides conclusive evidence. However, the histologic examination of biopsy specimens from photopatch tests in these cases is diagnostic, providing the tests are biopsied at the appropriate time.
Epstein S. Chlorpromazine Photosensitivity: Phototoxic and Photoallergic Reactions. Arch Dermatol. 1968;98(4):354–363. doi:10.1001/archderm.1968.01610160028006
Coronavirus Resource Center
Customize your JAMA Network experience by selecting one or more topics from the list below.
Create a personal account or sign in to: