By Gary M. White, MD
Trichorrhexis nodosa (TN) is a hair shaft disorder that may be diffuse or localized, and congenial or acquired.
- Clinically, it appears as multiple, tiny, whitish nodes all over the hair.
- Fracture of the hair shaft gives the appearance of two opposing paint brushes pushing against each other.
- Trauma resulting in damage to the cuticular cells and intercellular substance that binds them together is causative in the acquired type.
- Chronic trauma (e.g. excessive brushing, combing) often gives rise to TN localized to the distal ends of the hair. This is called distal trichorrhexis nodosa.
- Darker-skinned women may rarely be affected with proximal trichorrhexis nodosa in which the TN occurs proximally.
- Alternatively, congenital disorders, e.g. Netherton's syndrome or argininosuccinicaciduria may be associated with a weakened hair shaft and TN.
See fragile hair.
Int J Trichology. 2011 Jan-Jun; 3(1): 34–37
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