Changes in Telogen Rate, Hair Density, Hair Diameter and Rate of Growth in Androgenetic Alopecia of the Male: A Contribution to the Significance of Dysplastic Hair

In this 1986 pilot study, 26 male volunteers with androgenetic alopecia (ages 20-33) were examined to compare hair characteristics in the frontal and occipital regions. The study found that the frontal region had a higher proportion of telogen hair, lower hair density, and reduced hair growth rate compared to the occipital region. Hair diameter decreased in both regions as alopecia progressed. Dysplastic hair, which was thicker and had growth rates similar to anagen hair, was identified as growing hair with roots modified by plucking. The study concluded that the frontal hair showed regressive changes, such as reduced anagen phase, density, diameter, and growth rate, without prior accelerated growth.