Trichoscopy of Androgenetic Alopecia: A Systematic Review
Abstract
1. Introduction
2. Materials and Methods
3. Results
4. Discussion
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
Abbreviations
AGA | androgenetic alopecia |
FAGA | female androgenetic alopecia |
MAGA | male androgenetic alopecia |
References
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Trichoscopic Feature | Mean Value for Patients with AGA | Mean Value for Patients with MAGA | Mean Value for Patients with FAGA | Sensitivity | Specificity | Positive Predictive Value | Negative Predictive Value |
---|---|---|---|---|---|---|---|
Variation in hair diameter [12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38] | 94.07% (48.40–100%) | 99.81% | 89.82% | 94.07% | 91.41% | 95.99% | 30.76% |
Honeycomb pattern [13,14,15,17,19,20,21,25,26,29,31,34,38,39,40,41,42] | 32.33% (0–85.70%) | 36.25% | 29.64% | 32.33% | 84.18% | 75.92% | 62.80% |
Peripilar sign [13,14,15,16,17,18,19,20,21,24,25,26,27,28,29,31,34,35,36,37,38,39,42,43] | 43.27% (9.70–100%) | 63.67% | 42.53% | 43.27% | 96.06% | 95.76% | 51.92% |
Yellow dots [13,14,15,16,17,18,19,20,21,25,26,27,28,29,30,31,34,35,36,37,38,39,40,41,42,43] | 27.30% (2.90–91.20%) | 28.09% | 26.11% | 27.30% | 74.45% | 62.31% | 63.80% |
White dots [13,14,17,19,20,21,26,29,34,38,42,44] | 24.97% (14.70–90.00%) | 28.02% | 21.31% | 24.97% | 81.56% | 66.44% | 69.08% |
Vellus Hairs [14,16,20,25,26,30,31,33,34,35,36,37,42] | 66.45% (30–100%) | 61.25% | 78.19% | 66.45% | 65.39% | 56.97% | 58.80% |
Trichoscopic Feature | H-N1 | H-N2 | H-N3 | H-N4 | H-N5 | H-N6 | H-N7 | L1 | L2 | L3 |
---|---|---|---|---|---|---|---|---|---|---|
Variation in hair diameter [13,15,17,19,23,32] | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 85.35% | 99.37% | 100% |
Honeycomb pattern [13,15,17,19] | 50% | 55.17% | 16.26% | 46.56% | 65% | 78.05% | 96.77% | 14% | 38.82% | 52.78% |
Peripilar sign [13,15,19,44] | 53.57% | 53.45% | 34.48% | 37.02% | 43.75% | 37.80% | 36.11% | 26.72% | 43.99% | 36.70% |
Yellow dots [13,15,17,19] | 92.86% | 55.17% | 18.47% | 30.53% | 31.67% | 21.95% | 25.81% | 17.60% | 30.92% | 44.44% |
White dots [13,17,44] | N/A | 8.33% | 15.06% | 30.65% | 44.83% | 60% | 75.86% | 11.06% | 30.68% | 50% |
Disease | Trichoscopic Features |
---|---|
Androgenetic alopecia | Hair diameter variability in the frontal area |
Peripilar sign | |
Vellus hairs | |
Fibrosing alopecia in a pattern distribution | Perifollicular erythema |
Loss of follicular openings | |
Peripilar casts | |
Frontal fibrosing alopecia | Loss of follicular openings |
Peripilar casts | |
Perifollicular erythema | |
Presence of lonely hairs | |
Absence of vellus hairs | |
Traction alopecia | Empty hair follicles |
Perifollicular erythema | |
Atypical red vessels | |
Peripilar casts | |
Black dots | |
Broken hairs | |
Comma and coiled hairs | |
Telogen effluvium | Tip-pointed regrowing hairs |
Location of trichoscopic features such as hair shaft thickness and number of hairs in follicular units on whole scalp | |
Lichen planopilaris | Perifollicular erythema |
Peripilar casts | |
Loss of follicular openings | |
Violaceus areas | |
Dystrophic hairs | |
Absence of vellus hairs | |
Fibrotic white dots |
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Kuczara, A.; Waśkiel-Burnat, A.; Rakowska, A.; Olszewska, M.; Rudnicka, L. Trichoscopy of Androgenetic Alopecia: A Systematic Review. J. Clin. Med. 2024, 13, 1962. https://doi.org/10.3390/jcm13071962
Kuczara A, Waśkiel-Burnat A, Rakowska A, Olszewska M, Rudnicka L. Trichoscopy of Androgenetic Alopecia: A Systematic Review. Journal of Clinical Medicine. 2024; 13(7):1962. https://doi.org/10.3390/jcm13071962
Chicago/Turabian StyleKuczara, Agata, Anna Waśkiel-Burnat, Adriana Rakowska, Małgorzata Olszewska, and Lidia Rudnicka. 2024. "Trichoscopy of Androgenetic Alopecia: A Systematic Review" Journal of Clinical Medicine 13, no. 7: 1962. https://doi.org/10.3390/jcm13071962
APA StyleKuczara, A., Waśkiel-Burnat, A., Rakowska, A., Olszewska, M., & Rudnicka, L. (2024). Trichoscopy of Androgenetic Alopecia: A Systematic Review. Journal of Clinical Medicine, 13(7), 1962. https://doi.org/10.3390/jcm13071962