{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,3]],"date-time":"2026-07-03T09:16:48Z","timestamp":1783070208776,"version":"3.54.6"},"reference-count":12,"publisher":"SAGE Publications","license":[{"start":{"date-parts":[[2026,6,30]],"date-time":"2026-06-30T00:00:00Z","timestamp":1782777600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Dermatitis\u00ae"],"abstract":"<jats:p>Photopatch testing (PPT) represents the gold standard diagnostic evaluation for photoallergic contact dermatitis (PACD), a type IV hypersensitivity reaction to an antigen that occurs in the presence of ultraviolet A radiation. The most common photoallergens in the United States are organic sunscreen filters, whereas topical NSAIDs predominate in Europe. PACD is not rare among photosensitive patients; however, PPT is underperformed in clinical practice due to several limiting factors. Herein, we provide practical approaches to PPT based on expert opinion, including straightforward recommendations on patient selection and testing procedure.<\/jats:p>","DOI":"10.1177\/17103568261464368","type":"journal-article","created":{"date-parts":[[2026,6,30]],"date-time":"2026-06-30T07:32:48Z","timestamp":1782804768000},"update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Practical Techniques: Photopatch Testing"],"prefix":"10.1177","author":[{"given":"Brandon L.","family":"Adler","sequence":"first","affiliation":[{"name":"From the *Department of Dermatology, Keck School of Medicine, University of Southern California, Los Angeles, California, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jonathan","family":"Zippin","sequence":"additional","affiliation":[{"name":"Department of Dermatology, Weill Cornell Medical College, New York, New York, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vincent","family":"DeLeo","sequence":"additional","affiliation":[{"name":"From the *Department of Dermatology, Keck School of Medicine, University of Southern California, Los Angeles, California, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2026,6,30]]},"reference":[{"key":"e_1_3_1_2_1","doi-asserted-by":"publisher","DOI":"10.12788\/cutis.0651"},{"key":"e_1_3_1_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/cod.14677"},{"key":"e_1_3_1_4_1","doi-asserted-by":"publisher","DOI":"10.1111\/cod.14297"},{"key":"e_1_3_1_5_1","doi-asserted-by":"publisher","DOI":"10.1111\/cod.14743"},{"key":"e_1_3_1_6_1","doi-asserted-by":"publisher","DOI":"10.1097\/DER.0000000000000279"},{"key":"e_1_3_1_7_1","doi-asserted-by":"publisher","DOI":"10.1097\/DER.0000000000000535"},{"key":"e_1_3_1_8_1","doi-asserted-by":"publisher","DOI":"10.3109\/9781420019964-10"},{"key":"e_1_3_1_9_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.det.2020.02.004"},{"key":"e_1_3_1_10_1","doi-asserted-by":"publisher","DOI":"10.1111\/ddg.14314"},{"key":"e_1_3_1_11_1","first-page":"ljag085","article-title":"Prospective multi-centre photopatch test study of photoallergy to sunscreens and NSAIDs in Europe","author":"Ralph N","year":"2026","unstructured":"10.Ralph N, , Goossens A, , Carrascosa JM, et al. Prospective multi-centre photopatch test study of photoallergy to sunscreens and NSAIDs in Europe. 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