On Diseases of the Skin, Including the Exanthemata
The book On Diseases of the Skin, Including the Exanthemata was written by author Hebra, Ferdinand, 1816-1880 Here you can read free online of On Diseases of the Skin, Including the Exanthemata book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is On Diseases of the Skin, Including the Exanthemata a good or bad book?
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cit.), even explain the physiological shedding of the hair in this way. Here, however, we have only to deal with a transi- tory hyperplasia of the cells of the root-sheath. If the hyperplasia of the cells diminishes, they become more stable, and a new hair may be formed. They may either then simply nourish a new hair formed from the papilla, or they may ALOPECIA FUEFUEACEA. 22^ themselves undergo transformation in their central portion into a hair (KoUiker). This return to a regular production ...of hair actually occurs even in very advanced stages of Alopecia fur- furacea, and ia a degree of perfection, too, which leaves nothing to be desired. If the seborrhoea and the defluvium capillorum have per- sisted for six, or eight, or ten years or more, and if, during that time, the reproduction of new hairs has been in abeyance, then, usually, a return to the normal condition is not at all probable, and, at length, is no longer possible. When the process has continued for such a long time, the papillae and their vessels must have become so changed (atrophied*) that they are no longer capable of producing new cellsf for the formation of a young hair-bulb.
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