钉子(扣件)
斑秃
毛囊
皮肤病科
指甲基质
表皮(动物学)
医学
毛发病
发干
病理
解剖
钉板
内科学
银屑病
材料科学
冶金
作者
Robert Baran,R.P.R. Dawber,Eckart Haneke
出处
期刊:Skinmed
[Wiley]
日期:2005-01-01
卷期号:4 (1): 18-23
被引量:22
标识
DOI:10.1111/j.1540-9740.2005.02366.x
摘要
Hair and nails are often stated to have much in common in relation to their origin, anatomical structures, and common involvement in many diseases. Hair and nails are predominantly epithelial structures derived from primitive epidermis and made up of keratinous fibrils embedded in a sulfur‐rich matrix. It was first noted early in the 20th century that the nail unit was comparable in several respects to a hair follicle sectioned longitudinally and laid on on its side. The epithelial components of hair follicle and nail apparatus are differentiated epidermal structures that may be involved jointly in several ways as congenital and hereditary anomalies and acquired conditions such as alopecia areata, lichen planus, iatrogenic causes, and fungal infection. Multielemental characterization of human hair and nails shows that even after sample washing, many elements are enriched in the surface of the nails.
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