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An Bras Dermatol. 2019 Sep - Oct;94(5):612-614. doi: 10.1016/j.abd.2019.09.017. Epub 2019 Sep 30.

Dermoscopy - a simple and rapid in vivo diagnostic technique for tinea incognito.

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Department of Dermatology, Venereology, and Trichology, SKINNOCENCE: The Skin Clinic & Research Center, Gurugram, India. Electronic address:
Department of Dermatology & STD, S. Nijalingappa Medical College, Bagalkot, India.
Department of Dermatology & STD, Mazandaran University of Medical Sciences, Sari, Iran.
Department of Dermatology & STD, Patna Medical College & Hospital, Patna, India.


Tinea incognito resulting from corticosteroid abuse is becoming very common in the tropics. Its diagnosis is tricky owing to its confusing morphology, as well as practical and technical issues associated with mycological tests. Dermoscopy has now evolved as a novel diagnostic tool for diagnosing tinea incognito in such challenging situations, since the typical hair changes such as Morse-code hairs, deformable hairs, translucent hairs, comma and cork screw hairs, and perifollicular scaling may be seen despite steroid use, irrespective of mycological results.


Bar-code hairs; Black dots; Broken hairs; Comma-shaped hairs; Corkscrew-shaped hairs; Corporis; Corticosteroid abuse; Cruris; Deformable hairs; Dermatophytosis; Dermatoscopy; Dermoscopy; Hair; Morse-code hairs; Tinea; Tinea of vellus hair; Translucent hairs; Weights and measures

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