Trichoscopy for common hair loss diseases: Algorithmic method for diagnosis
Version of Record online: 22 DEC 2010
© 2011 Japanese Dermatological Association
The Journal of Dermatology
Special Issue: SPECIAL ISSUE: Dermoscopy (pages 1-75)
Volume 38, Issue 1, pages 71–75, January 2011
How to Cite
INUI, S. (2011), Trichoscopy for common hair loss diseases: Algorithmic method for diagnosis. The Journal of Dermatology, 38: 71–75. doi: 10.1111/j.1346-8138.2010.01119.x
- Issue online: 22 DEC 2010
- Version of Record online: 22 DEC 2010
- Received 27 August 2010; accepted 27 August 2010.
- alopecia areata;
- androgenetic alopecia;
- cicatricial alopecia;
In recent years, the usefulness of trichoscopy (scalp dermoscopy) has been reported for hair loss diseases. Here, characteristic trichoscopic features of common hair loss diseases are described using a DermLite II pro or Epilight eight. Characteristic trichoscopic features of alopecia areata are black dots, tapering hairs (exclamation mark hairs), broken hairs, yellow dots and short vellus hairs. In androgenetic alopecia (AGA), hair diameter diversity (HDD), perifollicular pigmentation/peripilar sign and yellow dots are trichoscopically observed. In all cases of AGA and female AGA, HDD more than 20%, which corresponds to vellus transformation, can be seen. In cicatricial alopecia (CA), the loss of orifices, a hallmark of CA, and the associated changes including perifollicular erythema or scale and hair tufting were observed. Finally, an algorithmic method for trichoscopic diagnosing is proposed.