24 citations
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August 2005 in “The American Journal of Dermatopathology” Vertical sections are better than horizontal sections for diagnosing alopecia.
March 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.
19 citations
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December 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.
3 citations
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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.
71 citations
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March 1995 in “Journal of The American Academy of Dermatology” Using both vertical and transverse sections for alopecia biopsies improves diagnosis without extra cost.