TLDR Seborrheic keratoses may partly come from hair follicle cells.
In a study of 325 seborrheic keratoses, trichostasis spinulosa was identified in 54 cases within keratinous cysts and between papillomatous surface keratin, as well as in adjacent hair follicles. Both conditions were more common in older individuals. Trichostasis spinulosa served as a marker for vellus hair follicles, suggesting that some seborrheic keratoses might incorporate and partially originate from the cells of the follicle's infundibular portion.
30 citations
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May 2010 in “British Journal of Dermatology” Intermediate hair follicles are a better model for studying hair growth and testing hair loss treatments.
50 citations
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July 2008 in “British Journal of Dermatology” 138 citations
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March 2007 in “Experimental cell research” Only a few hair-specific keratins are linked to inherited hair disorders.
276 citations
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January 2005 in “International review of cytology” More research is needed to understand how hair keratins work and their role in hair disorders.
199 citations
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January 2004 in “The International Journal of Developmental Biology” Hair follicle growth and development are controlled by specific genes and molecular signals.
29 citations
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April 2003 in “Experimental dermatology” Human hair follicles grown in vitro maintain normal keratin patterns and structure.
