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Updated: May 13, 2026

A New Technique for Quantitative Analysis of Hair Loss in Mice Using Grayscale Analysis
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在雄激素性脱发症中周围的标志:它真的表明周围透吗?

Dina Abdalla1, Manal Bosseila1, Mona R E Abdel-Halim1

  • 1Dermatology Department, Faculty of Medicine, Cairo University, Egypt.

Dermatology practical & conceptual
|February 16, 2024
PubMed
概括

在雄性发育性脱发症中,周围的标志并不表明周围毛囊透. 这种三角镜征兆在较浅的皮肤类型中更常见,可能与对比度而不是炎症有关.

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Multipotency and Niche of Bulge Stem Cell

A hair follicle or HF is a small part of the skin that produces the hair shaft. Paul Gerson Unna was the first to observe a bulge in the human hair follicle's outer root sheath (ORS). The bulge is present between the sebaceous gland and the arrector pili muscle and is the niche for hair follicle stem cells (HFSCs). The bulge is also a niche for melanocyte stem cells, and their loss results in graying of hair. The HFSCs express Sox9 and Lhx2, which help them maintain stemness and prevent...
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Accessory Structures of the Skin: Hair and Hair Follicles

Hair and hair follicles are integral components of the integumentary system. Hair is a filamentous structure composed mainly of a protein called keratin. It is found on the surface of the skin throughout the body, except for areas such as the palms of the hands and soles of the feet.
Hair is a keratinous filament growing out of the epidermis. It is primarily made of dead, keratinized cells. Hair strands originate at the epidermal penetration called the hair follicle. The hair shaft is the part...