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Quantification of Hair Follicles in the Scalp in Mexican Mestizo Population.
Skin Appendage Disord. 2018 Nov; 5(1):27-31.SA

Abstract

INTRODUCTION

There are no reports of the density of hair follicles in the scalp of Mexican mestizo population, necessitating the determination of normal references values for this population compared with other ethnic groups.

OBJECTIVE

To determine the average hair follicle count on the scalp in Mexican mestizo population.

MATERIALS AND METHODS

A total of 50 scalp samples (25 men and 25 women) from Mexican mestizo individuals aged between 19 and 60 years, with no clinical evidence of hair disease, obtained by biopsy punch at General Hospital "Dr. Manuel Gea González" were collected over 2 years. The total follicular density, vellus and terminal hair follicles, and the percentage in anagen and catagen-telogen phase were measured. χ2 was used as the basic statistical test.

RESULTS

The mean number of total hair follicles in our Mexican mestizo population was 23.2 ± 4.2, which is lower compared with Thais, Iranians, and Caucasians. However, the ratio of terminal and vellus hair follicles was higher than in Thais, Caucasians, and African-Americans. The percentage of terminal hairs in anagen phase was lower than in the other populations, and higher in telogen, without exceeding 15%, established as the normal reference value. There was an association between sex and terminal hairs in telogen phase (p < 0.05). The average follicular density per mm2 was slightly higher compared with African-Americans and Asians. Women had more terminal hairs than men.

CONCLUSIONS

The density of total follicles is lower in the Mexican mestizo population compared with Iranians, Thais, and Caucasians. However, the greater number of terminal hairs compared to vellus hairs gives the appearance of greater overall volume. The results of this study can be used as a reference for diseases of the scalp in the Mexican population.

Links

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Authors+Show Affiliations

Martínez-Luna E
Dermatopathology Department, "Dr. Manuel Gea González" General Hospital, Mexico City, Mexico.
Rodríguez-Lobato E
Dermatology and Dermato-Oncology Department, "Dr. Manuel Gea González" General Hospital, Mexico City, Mexico.
Vázquez-Velo JA
Dermatologist, Dermato-Oncology and Private Practice, Mexico City, Mexico.
Cuevas-González JC
Institute of Biomedical Sciences, Autonomous University of Ciudad Juárez, Ciudad Juárez, Mexico.
Martínez Velasco MA
Dermatologist, Trichology Clinic, National University of Mexico, Mexico City, Mexico.
Toussaint Caire S
Dermatopathology Department, "Dr. Manuel Gea González" General Hospital, Mexico City, Mexico.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30643777

Citation

Martínez-Luna, Eduwiges, et al. "Quantification of Hair Follicles in the Scalp in Mexican Mestizo Population." Skin Appendage Disorders, vol. 5, no. 1, 2018, pp. 27-31.
Martínez-Luna E, Rodríguez-Lobato E, Vázquez-Velo JA, et al. Quantification of Hair Follicles in the Scalp in Mexican Mestizo Population. Skin Appendage Disord. 2018;5(1):27-31.
Martínez-Luna, E., Rodríguez-Lobato, E., Vázquez-Velo, J. A., Cuevas-González, J. C., Martínez Velasco, M. A., & Toussaint Caire, S. (2018). Quantification of Hair Follicles in the Scalp in Mexican Mestizo Population. Skin Appendage Disorders, 5(1), 27-31. https://doi.org/10.1159/000488782
Martínez-Luna E, et al. Quantification of Hair Follicles in the Scalp in Mexican Mestizo Population. Skin Appendage Disord. 2018;5(1):27-31. PubMed PMID: 30643777.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Quantification of Hair Follicles in the Scalp in Mexican Mestizo Population. AU - Martínez-Luna,Eduwiges, AU - Rodríguez-Lobato,Erika, AU - Vázquez-Velo,Juan Antonio, AU - Cuevas-González,Juan Carlos, AU - Martínez Velasco,María Abril, AU - Toussaint Caire,Sonia, Y1 - 2018/05/22/ PY - 2017/12/29/received PY - 2018/3/26/accepted PY - 2019/1/16/entrez PY - 2019/1/16/pubmed PY - 2019/1/16/medline KW - Hair counts KW - Hair density in mestizo population KW - Scalp biopsy SP - 27 EP - 31 JF - Skin appendage disorders JO - Skin Appendage Disord VL - 5 IS - 1 N2 - INTRODUCTION: There are no reports of the density of hair follicles in the scalp of Mexican mestizo population, necessitating the determination of normal references values for this population compared with other ethnic groups. OBJECTIVE: To determine the average hair follicle count on the scalp in Mexican mestizo population. MATERIALS AND METHODS: A total of 50 scalp samples (25 men and 25 women) from Mexican mestizo individuals aged between 19 and 60 years, with no clinical evidence of hair disease, obtained by biopsy punch at General Hospital "Dr. Manuel Gea González" were collected over 2 years. The total follicular density, vellus and terminal hair follicles, and the percentage in anagen and catagen-telogen phase were measured. χ2 was used as the basic statistical test. RESULTS: The mean number of total hair follicles in our Mexican mestizo population was 23.2 ± 4.2, which is lower compared with Thais, Iranians, and Caucasians. However, the ratio of terminal and vellus hair follicles was higher than in Thais, Caucasians, and African-Americans. The percentage of terminal hairs in anagen phase was lower than in the other populations, and higher in telogen, without exceeding 15%, established as the normal reference value. There was an association between sex and terminal hairs in telogen phase (p < 0.05). The average follicular density per mm2 was slightly higher compared with African-Americans and Asians. Women had more terminal hairs than men. CONCLUSIONS: The density of total follicles is lower in the Mexican mestizo population compared with Iranians, Thais, and Caucasians. However, the greater number of terminal hairs compared to vellus hairs gives the appearance of greater overall volume. The results of this study can be used as a reference for diseases of the scalp in the Mexican population. SN - 2296-9195 UR - https://www.unboundmedicine.com/medline/citation/30643777/Quantification_of_Hair_Follicles_in_the_Scalp_in_Mexican_Mestizo_Population_ DB - PRIME DP - Unbound Medicine ER -