The term "trichilemmal" refers to the outer root sheath.

Trichilemmal cysts are derived from the outer root sheath of the hair follicle.

The bulge is in the outer root sheath at the insertion point of the arrector pili muscle.

Gli2 is expressed in the interfollicular epidermis and the outer root sheath of hair follicles in normal human skin.

The inner root sheath of the hair follicle is located between the outer root sheath and the hair shaft.

The hair matrix, or simply matrix, produces the actual hair shaft as well as the inner and outer root sheaths of hair.

Neutralizing body against DKK-1 reversed DHT effects on outer root sheath keratinocytes.

This suggests K6hf mutation structurally weakens the companion layer separating the inner and outer root sheath and increases the chances that a beard hair will in-grow.

Location of PRLR in the dermal papilla and outer root sheath indicates action of prolactin directly on the growth controlling cells within wool follicles.

When BMP4 is expressed ectopically, within transgenic mice the hair follicle outer root sheath (ORS) the proliferation of the cell matrix is inhibited.

PRLR mRNA was most abundant in the dermal papilla, but also evident in the outer root sheath, hair germ, skin glands and epidermis.

Immunoreaction occurred in a patchy pattern in the epidermis and outer root sheaths of hair follicles, as well as in nerves and in capsulated and non-capsulated sensory receptors.

At a cellular level, alterations begin with the reorganization of keratin filaments and are first seen at the level of the hair follicle outer root sheath (ORS), where K16 expression is known to occur constitutively.

Keratin 17 is expressed in several epithelial structures, most notably in sebaceous glands, the outer root sheath of hair follicles, and the nail bed; its expression correlates well to the clinical phenotypic expression of both steatocystoma multiplex and pachyonychia congenita type 2.