Abstract
Trichorrhexis invaginata (bamboo hair) is an abnormality of the hair in which the hair shaft telescopes into itself (invaginates) at several points along the shaft. On a handheld dermoscope, trichorrhexis invaginata appears as multiple small nodules spaced along the shaft. High magnifications produced by a videodermoscope show invagination of the distal portion of the hair shaft into its proximal portion, forming a “ball-in-cup” appearance. When the hair shaft ruptures at the site of this abnormality, the distal end of the remaining hair shaft shows a “golf tee-like” invagination. Trichorrhexis invaginata is pathognomonic of Netherton’s syndrome.
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© 2012 Springer-Verlag London
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Rakowska, A., Olszewska, M., Rudnicka, L. (2012). Trichorrhexis Invaginata and Netherton’s Syndrome. In: Rudnicka, L., Olszewska, M., Rakowska, A. (eds) Atlas of Trichoscopy. Springer, London. https://doi.org/10.1007/978-1-4471-4486-1_9
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DOI: https://doi.org/10.1007/978-1-4471-4486-1_9
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