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alopecia (ălˌəpēˈshēə): see baldness.
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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



(baldness), thinning or complete absence of hair in an isolated area or on the entire surface of the skin.

Alopecia is usually localized on the scalp and face; less frequently, it is localized in the armpits, the pubic region, or elsewhere. Congenital, premature, senile, and other forms of the disease exist. Symptomatic alopecia—the result of acute infections, nervous diseases, poisoning, endocrine disorders, fungal diseases, or secondary syphilis—is characterized by the temporary focal or diffuse loss of hair in any region of the body; the skin remains unaltered at the morbid site. Alopecia areata, a special type of baldness, is manifested by the sudden appearance of hairless foci that are round or oval and well defined. With the merging of these foci, complete baldness can occur; the skin is unchanged and subjective sensations are absent. Angioneurosis and endocrine disorders are the principal causes of alopecia areata.

Congenital alopecia is rarely encountered; the manifestation of a developmental disorder, it is usually noticed at birth or in the first months of life. Premature alopecia is observed most often in men 20 to 25 years of age. The condition is characterized by the gradual, progressive loss of hair from the scalp. The skin in such cases becomes thin, and its texture, silky. In women affected with premature alopecia, only a thinning of hair occurs. In both men and women, senile alopecia progresses in a manner similar to premature alopecia but sets in at a later age (55–60 years). Senile alopecia is a result of normal physiological aging.

Treatment of alopecia involves the administering of vitamins A, B1, and B6, of hormones, and furocoumarin preparations—peucedanin, Beroksan, Ammifurin—in combination with ultraviolet irradiation. Topical measures include physiotherapy, massage, and rubbing with tinctures of cayenne pepper.


Zalkind, E. S. Bolezni volos. [Leningrad] 1959.
Mnogotomnoe rukovodstvopo dermatovenerologii, vol. 3. Moscow, 1964.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.


Loss of hair; baldness.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.


loss of hair, esp on the head; baldness
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
It often results in development of localized circular alopecic lesions most commonly on face, lateral thorax, abdomen and tail (Fig.
Skin lesions were characterized by blackening and thickening of skin in axial and perineal region which spread from axial region over a period of time, patchy circular alopecic areas from neck caudially, pustular lesions on ventral abdomen, and circumscribed lesions with scaling, exfoliation on face as observed in various skin infections.
Larger lesions may be alopecic, hyperpigmented and ulcerated (Scott, 2007).
In cats, cutaneous papillomas rarely occur; when they are diagnosed, they usually have a stalk-like appearance, and the skin around the lesion is alopecic (BERNAYS et al., 1999).
Clinical examination revealed multifocal, alopecic, well-demarcated, erythematous plaques.
The main gross changes are alopecic areas, papules, exudation, and crusts in the skin and white or gray nodules in numerous organs (PANCIERA et al., 1966; JOHNSON et al., 1992; PANCIERA et al.,1992; BARROS et al., 2001).
Clinical examination revealed localized well circumscribed, alopecic plaque with hyper pigmentation on periphery at metacarpal and metatarsal region.
Lesions due to scratching rapidly resolved over the whole body surface including face, resulting in hair growth and resolution of alopecic areas (Fig.
At necropsy the goat was emaciated, completely alopecic (Figure 1B) and presented swollen radiocarpal-ulnar joints.
However, generalised skin lesions were observed on the ventral abdomen, fore and hind limbs and tail region which were characterized by crusty, scaly and alopecic patches (Fig.