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- W2886232011 abstract "<b><i>Background:</i></b> Androgenetic alopecia (AGA) and alopecia areata (AA) are common causes of alopecia which can sometimes be difficult to differentiate clinically. Horizontal sections of scalp biopsies are used to study non-cicatricial alopecias due to the ability to perform both quantitative and morphometric analysis of hair follicles on them. <b><i>Methods:</i></b> It was a prospective, cross-sectional study conducted to assess the utility of horizontal sections to differentiate between the alopecias. Fifty-two cases were included: 20 cases of male AGA, 11 of female AGA and 21 cases of AA. After clinical examination and dermoscopy, a skin biopsy was taken and subjected to transverse sectioning. Histopathological assessment was done by two dermatopathologists blinded to clinical details. <b><i>Results:</i></b> Among the quantitative parameters, terminal:vellus hair ratio (3.08 in AGA and 1.83 in AA, <i>p</i> = 0.0091) and anagen:non-anagen hair ratio (9.25 in AGA and 3.56 in AA, <i>p</i> = 0.0021) were significantly lower in AA. In qualitative parameters, peribulbar inflammation was seen in 63% of AA cases (<i>p</i> = 0.0001). Pigment casts were seen in twice the number of AA (57%) than AGA (26%) cases. Broad avascular stelae and focal trichomalacia were seen in 9.5% of AA cases. <b><i>Conclusion:</i></b> Besides peribulbar inflammation, we found a lower anagen:non-anagen hair ratio and presence of pigment casts in transverse sections of scalp biopsies favouring AA over AGA." @default.
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- W2886232011 date "2018-01-01" @default.
- W2886232011 modified "2023-10-12" @default.
- W2886232011 title "Utility of Horizontal Sections of Scalp Biopsies in Differentiating between Androgenetic Alopecia and Alopecia Areata" @default.
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- W2886232011 doi "https://doi.org/10.1159/000490459" @default.
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