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Hair counts from normal scalp biopsy in Taiwan.
Dermatol Surg. 2012 Sep; 38(9):1516-20.DS

Abstract

BACKGROUND

Horizontal scalp biopsy is a better method to use when evaluating hair disorders, but an accurate diagnosis requires quantitative data regarding normal hair counts to be used as a control, which are currently available only for Caucasians, African Americans, Koreans, and Iranians.

OBJECTIVES

To evaluate scalp hair counts in the Taiwanese population.

METHODS

Two 4-mm punch biopsies were taken from clinically normal-looking scalp skin of 31 patients who underwent scalp surgery for non-hair-loss disorders. Punch biopsy specimens were sectioned horizontally at the sebaceous gland level and the number of follicular units, terminal hairs including anagen and telogen hairs, and vellus hairs were counted and compared with other published data. The numbers of hairs were also compared between the sexes, different age groups, and different anatomical locations of the scalp.

RESULTS

The average counts of total hairs, terminal hairs, vellus hairs, and follicular units per 4-mm punch scalp skin were 21.3, 20.5, 0.8, and 9.4, respectively. The mean ratio of anagen hair to telogen hair was 91.6:8.4 and of terminal hair to vellus hair was 25.3:1. The average density of hair follicles was 1.69 mm(2). The mean counts of terminal hairs, total hairs, follicular units, and hair follicles/mm(2) were significantly different between different age groups.

CONCLUSION

Differences in hair count parameters were recognized between different ethnic groups. Parameters of hair density established in the Taiwanese population will provide clinicians with useful reference data for the evaluation of hair disorders in Asians.

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Authors+Show Affiliations

Ko JH
Department of Dermatology, Chang Gung Memorial Hospital, Taipei, Taiwan.
Huang YH
No affiliation info available
Kuo TT
No affiliation info available

MeSH

AdultAge FactorsAsian Continental Ancestry GroupBiopsyFemaleHairHumansMaleMiddle AgedProspective StudiesScalpSex FactorsTaiwanYoung Adult

Pub Type(s)

Journal Article

Language

eng

PubMed ID

22687262

Citation

Ko, Jui-Hung, et al. "Hair Counts From Normal Scalp Biopsy in Taiwan." Dermatologic Surgery : Official Publication for American Society for Dermatologic Surgery [et Al.], vol. 38, no. 9, 2012, pp. 1516-20.
Ko JH, Huang YH, Kuo TT. Hair counts from normal scalp biopsy in Taiwan. Dermatol Surg. 2012;38(9):1516-20.
Ko, J. H., Huang, Y. H., & Kuo, T. T. (2012). Hair counts from normal scalp biopsy in Taiwan. Dermatologic Surgery : Official Publication for American Society for Dermatologic Surgery [et Al.], 38(9), 1516-20. https://doi.org/10.1111/j.1524-4725.2012.02462.x
Ko JH, Huang YH, Kuo TT. Hair Counts From Normal Scalp Biopsy in Taiwan. Dermatol Surg. 2012;38(9):1516-20. PubMed PMID: 22687262.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Hair counts from normal scalp biopsy in Taiwan. AU - Ko,Jui-Hung, AU - Huang,Yu-Huei, AU - Kuo,Tseng-Tong, Y1 - 2012/06/11/ PY - 2012/6/13/entrez PY - 2012/6/13/pubmed PY - 2012/12/10/medline SP - 1516 EP - 20 JF - Dermatologic surgery : official publication for American Society for Dermatologic Surgery [et al.] JO - Dermatol Surg VL - 38 IS - 9 N2 - BACKGROUND: Horizontal scalp biopsy is a better method to use when evaluating hair disorders, but an accurate diagnosis requires quantitative data regarding normal hair counts to be used as a control, which are currently available only for Caucasians, African Americans, Koreans, and Iranians. OBJECTIVES: To evaluate scalp hair counts in the Taiwanese population. METHODS: Two 4-mm punch biopsies were taken from clinically normal-looking scalp skin of 31 patients who underwent scalp surgery for non-hair-loss disorders. Punch biopsy specimens were sectioned horizontally at the sebaceous gland level and the number of follicular units, terminal hairs including anagen and telogen hairs, and vellus hairs were counted and compared with other published data. The numbers of hairs were also compared between the sexes, different age groups, and different anatomical locations of the scalp. RESULTS: The average counts of total hairs, terminal hairs, vellus hairs, and follicular units per 4-mm punch scalp skin were 21.3, 20.5, 0.8, and 9.4, respectively. The mean ratio of anagen hair to telogen hair was 91.6:8.4 and of terminal hair to vellus hair was 25.3:1. The average density of hair follicles was 1.69 mm(2). The mean counts of terminal hairs, total hairs, follicular units, and hair follicles/mm(2) were significantly different between different age groups. CONCLUSION: Differences in hair count parameters were recognized between different ethnic groups. Parameters of hair density established in the Taiwanese population will provide clinicians with useful reference data for the evaluation of hair disorders in Asians. SN - 1524-4725 UR - https://www.unboundmedicine.com/medline/citation/22687262/Hair_counts_from_normal_scalp_biopsy_in_Taiwan_ L2 - https://onlinelibrary.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=1076-0512&date=2012&volume=38&issue=9&spage=1516 DB - PRIME DP - Unbound Medicine ER -