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January 2019 in “Indian Journal of Dermatology” Transverse scalp biopsy sections help diagnose different alopecias by showing hair follicle details and inflammation patterns.
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Combining vertical and horizontal sectioning improves scalp biopsy analysis for alopecia.
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July 2005 in “Journal of The American Academy of Dermatology” Using both vertical and transverse sections gives a better diagnosis of alopecia than using one method alone.
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September 2011 in “Clinical and Experimental Dermatology” Transverse scalp sections are better for diagnosing non-scarring hair loss, while vertical sections are better for a specific scarring hair loss called lichen planopilaris.
February 2009 in “Journal of the American Academy of Dermatology” Transverse sections are better for non-scarring hair loss, vertical sections are better for lichen planopilaris, and either method works for other scarring hair loss types.