Woods lamp used in diagnosis of: (A) Pityriasis versicolor, (B) Vitiligo, (C) Porphyria, (D) All of the above
Answer is D. Pityriasis versicolor- golden yellow fluorescence tinea capitis grey patch type - greenish yellow fluorescnece porphyria- reddish fluorescence of urine and teeth erythrasma - coral red fluorescence pseudomonas - greenish fluorescence iadvl textbook of dermatology page 94