Avaliação quantitativa em cortes histológicos transversais do couro cabeludo

The study analyzed 80 scalp biopsy samples from 20 white cadavers, aged 21 to 78, to gather quantitative data on normal scalp structures. The median values found were 16.5 total follicles, 8 follicular units, 15 terminal follicles, 1 vellus follicle, and 1 fibrous tract per sample. The majority of follicles (92.2%) were in the anagen phase, with 1.6% in catagen and 6.2% in telogen. Men had fewer follicular units and total and telogen follicles but more total follicles and fibrous tracts in the frontal and vertex areas than women. Women had a higher number of telogen follicles and germinative units. The terminal to vellus ratio was 15:1 across all samples. These results provide a reference for normal scalp structures and suggest physiological reasons for the higher incidence of telogen effluvium complaints in women compared to men. The study indicates the need for further research with larger sample sizes to better understand these findings.