March 2024 in “Journal of clinical medicine” This study examined trichoscopic findings in androgenetic alopecia, reporting that hair diameter variability, vellus hairs, and the peripilar sign are valuable indicators for diagnosing this condition.
7 citations
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August 2023 in “Skin Research and Technology” This study highlights age and sex as key factors influencing scalp parameters, thereby affecting hair health and suggesting they should be considered in developing hair care strategies.
December 2022 in “JEADV Clinical Practice” In this study, researchers found that using a handheld digital microscope, hair diameter was a better determinant of perceived alopecia severity in androgenetic alopecia than hair density.
2 citations
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May 2022 in “Clinical, Cosmetic and Investigational Dermatology” This study reports that quantitative trichoscopy, while noninvasive and convenient, provides less accurate hair density data compared to invasive histopathologic examination, which was demonstrated in a sample of adult Chinese individuals without alopecia.
11 citations
,
September 2021 in “Skin Appendage Disorders” This study observed variability in hair density and types across different scalp areas in cadaver biopsies, providing reference values that could aid in diagnosing hair disorders in Asians.
May 2021 in “Pakistan Journal of Medical and Health Sciences” This review discusses how trichoscopy is becoming a preferred non-invasive diagnostic tool over trichograms for evaluating hair disorders, although it reports no clinical results.
1 citations
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March 2021 in “Frontiers in Medicine” In this study, female pattern hair loss in Chinese Han patients was characterized by decreased hair density and shaft diameter, with minor gender differences and the vertex most affected.
31 citations
,
February 2020 in “BioMed Research International” This study found that in the Thai population, hair density varies by scalp location and decreases with age, and that Asians generally have lower hair density compared to Caucasian and African populations.
18 citations
,
July 2018 in “Skin appendage disorders” This review discusses trichoscopic features of hair disorders in individuals with dark skin phototypes and reports no new clinical results; the authors emphasize the need for more specific diagnostic criteria for these populations.
1 citations
,
January 2018 in “Indian journal of dermatopathology and diagnostic dermatology” This review discusses the use of trichoscopy as a valuable diagnostic and prognostic tool for various hair and scalp disorders, reporting no new clinical results.
31 citations
,
December 2017 in “Skin Appendage Disorders” The study observed that Americans of Hispanic descent have a statistically significant higher hair density than individuals of African descent but lower than Caucasians, which may assist in diagnosing and researching hair disorders.
9 citations
,
April 2017 in “International Journal of Dermatology” This study found significant differences in hair diameter between males and females across different zones of the safe donor area, which may aid in selecting optimal donor regions for hair transplantation surgeries.
45 citations
,
January 2012 in “International Journal of Trichology” This study reported that trichoscopy is a more effective diagnostic tool than the trichogram for early diagnosis of FAGA, regardless of hair shaft diversity cut-off levels.
10 citations
,
January 2011 in “Journal of biomedical optics” This study found that optical coherence tomography provides highly reproducible and less variable measurements of hair shaft thickness compared to standard light microscopy, offering a promising noninvasive tool for clinical practice.
45 citations
,
July 2009 in “Journal of human genetics” This study found that an SNP in the FGFR2 gene, rs4752566, was significantly associated with hair thickness in Asian populations, suggesting an effect on hair morphology through altered FGFR2 expression levels.
46 citations
,
April 2009 in “Journal of Dermatological Case Reports” This study established standard trichoscopy norms for adult white females, providing benchmarks for hair thickness, percentage of thin hairs, and pilosebaceous units with single hair across different scalp areas.
91 citations
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January 2009 in “International Journal of Trichology” This review discusses the advantages and limitations of various hair loss evaluation methods but reports no new results; it emphasizes the importance of cautious interpretation for these diagnostic tools.
89 citations
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August 2008 in “Human genetics” This study found that the EDAR 1540T/C genetic variant is significantly associated with hair thickness variation in Japanese populations, enhancing previously observed associations in Southeast Asian groups.
44 citations
,
August 2008 in “Archives of Dermatology” This abstract provides no results; it is a website notification about cookies and general access to JAMA content.
304 citations
,
July 2006 in “Journal of The American Academy of Dermatology” This study found that videodermoscopy enhances diagnostic accuracy for scalp and hair disorders beyond simple clinical inspection and reveals novel disease features that could improve clinical understanding.
17 citations
,
September 2005 in “International Journal of Dermatology” African hair is more fragile due to its unique shape and internal structure.
115 citations
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September 2005 in “International Journal of Dermatology” Different ethnic groups have unique hair growth patterns, with African hair growing slower and less dense, Asian hair growing fast but sparse, and Caucasian hair being densest; men are more likely to experience hair loss than women.
33 citations
,
April 2005 in “British Journal of Dermatology” This study found that age and follicular miniaturization were extremely weak predictors of total hair count in women with hair loss.
70 citations
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June 2003 in “Journal of Investigative Dermatology Symposium Proceedings” This study reports that the TrichoScan method effectively measures hair growth parameters and detected significant improvements in hair counts and thickness in men with androgenetic alopecia after finasteride treatment.
129 citations
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June 1999 in “Archives of Dermatology” This study found that hair density is significantly lower in African Americans compared to whites, which may affect the evaluation and diagnosis of scalp biopsy specimens in this population.