acne

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acne,

common inflammatory disease of the hair follicles and sebaceous glandssebaceous gland
, gland in the skin of mammals that secretes an oily substance called sebum. In humans, sebaceous glands are primarily found in association with hair follicles but also occur in hairless areas of the skin, except for the palms of the hand and soles of the feet.
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 characterized by blackheadsblackhead,
yellowish or blackish plug of material accumulated in the duct of a sebaceous gland. The material consists of keratin (horny cells of the epidermis) and modified sebum (oily secretions of the sebaceous gland). Blackheads are the primary lesions in acne.
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, whiteheads, pustules, nodules and, in the more severe forms, by cysts and scarring. The lesions appear on the face, neck, back, chest, and arms. There are several types of acne, including tropical acne, a condition of light-skinned people who are exposed to unaccustomed heat and humidity, and chloracne, a form resulting from exposure to chlorinated hydrocarbons.

The most common type is acne vulgaris, a form prevalent among adolescents. Although its exact cause is not known, it is undoubtedly related both to genetic predisposition and to the increased hormonal activity that occurs at puberty, which causes an overproduction of sebum, the oily secretion of the sebaceous glands. Exposure to external oils and grease (e.g., oil-based cosmetics or hair products, occupational use of cooking oils) can worsen the condition. There is no connection between diet and acne.

Washing the skin removes surface oils and can prevent acne from spreading. The contents of blackheads and pustular lesions should be evacuated only by a physician under proper aseptic conditions to lessen the possibility of scarring. Application of benzoyl peroxide, retinoic acid, azelaic acid, and antibiotics to the skin can clear many cases; exposure to ultraviolet light may also be used. More severe cases of acne may require oral antibiotic treatment. Treatment of the most resistant cases of acne includes the use of isotretinoin (Accutane), a drug that decreases sebaceous secretions. Isotretinoin is a well-established teratogen (i.e., it causes birth defects) and is not given to women who are pregnant. In the past dermabrasion (scraping off of the top layer of skin) was used to improve the appearance of skin scarred by acne, but such severe effects can now be avoided with proper treatment.

Acne

 

the name used to designate various skin eruptions that are often associated with functional disturbances of the sebaceous glands. There are several types of acne.

Common acne occurs during adolescence, usually on the face, chest, and back. It appears in the form of pink papules that may attain the size of a pea; these papules sometimes develop sebaceous plugs, or comedones, which often suppurate. The causes of common acne include hormonal changes, infections, and hereditary predisposition.

Rosacea is a type of acne that is most common in women over 40. It is marked by dilation of the capillaries of the facial skin (telangiectasis) and by the development of red papules that sometimes suppurate.

Some types of acne are caused by exposure to certain substances or by the use of some medicines. They include petroleum acne, which results from contact with petroleum products, and halogen acne, caused by the use of preparations of such halogens as bromine and iodine. Acne may also result from the use of hormonal preparations.

Acne is treated externally with suspensions, ointments, and the application of alcohol. General treatment includes physical therapy and the administration of vitamins, antibiotics, and hormones.

REFERENCE

Kozhnye i venericheskie bolezni, 3rd ed. Moscow, 1975. Pages 236–38,242–44.

A. S. RABEN

acne

[′ak·nē]
(medicine)
A pleomorphic, inflammatory skin disease involving sebaceous follicles of the face, back, and chest and characterized by blackheads, whiteheads, papules, pustules, and nodules.

acne

a chronic skin disease common in adolescence, involving inflammation of the sebaceous glands and characterized by pustules on the face, neck, and upper trunk
References in periodicals archive ?
For this reason, the current study was an attempt to explore the predictive effect of body image and life satisfaction on rejection sensitivity among university students suffering from acne vulgaris.
reviewed the laboratory changes in patients with acne vulgaris during isotretinoin therapy.
further examination of these herbs as adjunct to or as an alternative treatment of acne vulgaris is required.
Androgen status in adolescent women with acne vulgaris. J Dermatol.
Out of the 26 cases of acne vulgaris, majority (12 cases, 24%) had grade II acne vulgaris and grade IV was noted in only 3 cases (6%), details given in Table 2.
There were 58 patients in Group A and 12 patients in Group B based on the Grades of Acne vulgaris. Serum zinc levels were estimated in both the groups.
The present research sought to find out the difference in IL-19 serum concentration on degrees of severity of acne vulgaris; this is the pilot study of IL-19 serum in acne vulgaris patients.
This case-control study included 118 patients with acne vulgaris, presenting to our dermatology clinic between May 2014 and May 2015.
Fortnightly Review: Acne vulgaris. BMJ 1994; 308(6932):831-833.
Acne vulgaris is a chronic inflammatory disease of pilosebaceous units characterized by comedones, papules, pustules, nodules, cysts, abscesses, and later on sometimes as widespread scarring.
Oral spironolactone for acne vulgaris in adult females: a hybrid systematic review.
Acne vulgaris, a multifactorial disease, is one of the most common dermatological conditions that is encountered in clinical practice and affecting upto 80% adolescents and young adults at some stage.