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Hair Disorders and Alopecia

  • Zbigniew RuszczakEmail author
Reference work entry

Hair loss is a common problem in all ethnic groups. It may occur in all parts of the body; however, it more commonly affects the scalp, and the patient presents with major concerns about cosmetic effects, long-term outcome, and perspectives. Physiologically, hair is of minor benefit to humans. However, the psychological effect and disturbances of hair growth are a frequent source of concern to all age groups, including children and adolescents.

Hair is a protein product of follicles having periodic development phases, which assure physiologic regrowth. Hair is distributed everywhere on the body surface except palms, soles, vermilion part of the lips, glans penis and penile shaft, nail bed, and sides of the fingers and toes.

By week 22 of gestation, a developing fetus has all of its hair follicles formed. At this stage of life, there are about five million hair follicles on the body. There are a total of one million on the head, with 100,000 of those follicles residing on the scalp....

Keywords

Hair Follicle Hair Loss Hair Growth Scalp Hair Alopecia Areata 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  1. 1.Division of Dermatology, Department of MedicineInstitute of Medicine, Sheikh Khalifa Medical CityAbu DhabiUnited Arab Emirates

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