title: Allergic contact photodermatitis to para-aminobenzoic acid.
abstract: Allergic photocontact dermatitis developed in a patient to a commercial sunscreen preparation containing para-aminobenzoic acid (PABA) in an alcohol base. Photopatch testing showed photosensitivity to PABA. Sensitization could only be detected when PABA was tested in an alcohol vehicle; a photopatch test to PABA in petrolatum was negative.
mesh_terms: D010129:4-Aminobenzoic Acid / Q000009:adverse effects*; D062365:Aminobenzoates / Q000009:adverse effects*; D003877:Dermatitis, Contact / Q000209:etiology*; D004342:Drug Hypersensitivity / Q000209:etiology*; D005260:Female; D006801:Humans; D008875:Middle Aged; D010787:Photosensitivity Disorders / Q000139:chemically induced*
chemical_list: D062365:Aminobenzoates; D010129:4-Aminobenzoic Acid