alopecia

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alopecia

(ăl'əpē`shēə): see baldnessbaldness,
thinning or loss of hair as a result of illness, functional disorder, or hereditary disposition; also known as alopecia. Male pattern baldness, a genetic trait, is the most common cause of baldness among white males.
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Alopecia

 

(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.

REFERENCES

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

I. IA. SHAKHTMEISTER

alopecia

[‚a·lə′pē·shə]
(medicine)
Loss of hair; baldness.

alopecia

loss of hair, esp on the head; baldness
References in periodicals archive ?
and otitis 1 Scales and crusts on pruritus ventral abdomen and lateral thighs, few alopecic areas, dry and malodorous hair coat 2 Scales, dry hair coat, pruritus easily epilated hairs + otitis and ear erythrema 3 Scales, malodorous otitis skin, dry hair coat and erythrema on ears 4 Severe follicular pruritus plugging scales on ventral abdomen, crust under inner aspect of thigh, dry hair coat and local alopecia 5 Scales, dry hair coat pruritus and few erythemic spot on ventral abdomen Table II: Hemato-biochemical parameters before and after Vitamin A treatment Parameters Control (n = 6) Hb (g/dl) 11.
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.
Lesions due to scratching rapidly resolved over the whole body surface including face, resulting in hair growth and resolution of alopecic areas (Fig.
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.
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.
Both animals had papular-nodular, single, encircled, alopecic and pruritic lesions, located at the tail base and posterior limbs, sized between 0.
Lesions due to scratching rapidly resolved over 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.
Lesions may be erythematous, scaly (yellow to slate gray with or without plaques), greasy or dry, crusty, hyperpigmented, lichenified and perhaps saliva stained and alopecic (Patterson and Frank, loc.