Granuloma Annulare Treatment — SCE Dermatology MCQ
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Correct answer: E — Monochromator phototesting across UV and visible spectra
Solar urticaria is evaluated by controlled phototesting across relevant ultraviolet and visible wavelengths. Monochromator testing identifies the action spectrum and threshold, which can guide photoprotection and desensitisation strategies.
Reference: https://academic.oup.com/bjd/pages/bad-guidelines