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Sebaceous Extrusion Sign: A Novel Histopathologic Clue in Traction Alopecia Publisher Pubmed

Summary: Could a new tissue clue help diagnose traction alopecia? A case series describes the 'Kamyab sign,' with oil glands emerging through hair follicles; validation is needed. #Dermatology #HairLoss

Kamyab Hesari K ; Saber M ; Montazeri S ; Tavakolian H
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Source: American Journal of Dermatopathology Published:2026


Abstract

Tractional alopecia is a form of hair loss caused by prolonged tension on hair follicles, typically resulting from tight hairstyles. Although histopathological features of TA have been described, differentiation from other alopecias remains challenging. In this case series, we report a novel histopathological finding (Kamyab sign) characterized by the extrusion of sebaceous glands through the follicular infundibulum onto the skin surface. Copyright © 2026 Wolters Kluwer Health, LLC. All rights reserved.
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Sebaceous Extrusion Sign: A Novel Histopathologic Clue in Traction Alopecia