000 01809cam a2200205 4500500
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041 _afre
042 _adc
100 1 0 _aBruze, Magnus
_eauthor
245 0 0 _aThoughts on the interpretation of positive photopatch test reactions
260 _c2020.
500 _a59
520 _aBackground: Positive photopatch test reactions are classified according to the International Contact Dermatitis Group. The various reaction patterns are interpreted to represent patterns such as contact allergy, photocontact allergy, photoaugmentation, and photoinhibition. Objective: To investigate whether there are any weaknesses in the interpretation of reaction patterns. Materials & Methods: A dermatitis patient with photoallergic contact dermatitis due to ketoprofen was photopatch tested with serial dilutions of ketoprofen in ethanol. The reaction patterns for the various concentrations were used as a basis for discussion on weaknesses regarding the present interpretations of positive photopatch test reactions. Results: The reaction patterns to the ketoprofen photopatch at various concentrations were interpreted as (i) contact allergy, (ii) contact allergy with photoaugmentation, (iii) contact allergy and photocontact allergy, and (iv) photocontact allergy. Conclusion: The present interpretation of positive photopatch test reactions is unreliable and therefore insufficient regarding appropriate advice for patients.
690 _aketoprofen
690 _aphotopatch testing
690 _ainterpretation
690 _aphotoallergic contact dermatitis
786 0 _nEuropean Journal of Dermatology | 30 | 5 | 2020-09-01 | p. 541-544 | 1167-1122
856 4 1 _uhttps://shs.cairn.info/revue-european-journal-of-dermatology-2020-5-page-541?lang=en&redirect-ssocas=7080
999 _c602989
_d602989