comedones


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comedo

 [kom´ĕ-do] (pl. comedo´nes) (L.)
a plug of keratin and sebum within the dilated orifice of a hair follicle frequently containing the bacteria Corynebacterium acnes, Staphylococcus albus, and Pityrosporum ovale; see also acne vulgaris.
closed comedo whitehead (def. 1).
open comedo blackhead.

comedones

See comedo.
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COMEDONES
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COMEDONES

comedo

(kŏm′ă-dō) plural.comedonesplural.comedos [L. comedere, to eat up]
The typical small skin lesion of acne vulgaris and seborrheic dermatitis. The closed form is called a whitehead. It consists of a papule from which the contents are not easily expressed. When inflamed these lesions form pustules and nodules. The open form of comedo, called a blackhead, is rarely inflamed. It has a dilated opening from which the oily debris is easily expressed. Both forms are usually located on the face, but the chest and back may be involved.
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References in periodicals archive ?
Scott's experience, the most common skin-related side effects of steroid use are comedones, sebaceous cysts, and cystic acne, followed by rosacea, seborrhea, pyoderma, gynecomastia, fungal infections, hirsutism, stria, jaundice, and alopecia of the scalp, Dr.
PAPULES & PUSTULES Papules are comedones that have become inflamed, forming a sore small red or pink bump.
The condition known eponymously as Favre and Racouchot disease, in which clusters of large comedones appear on a thickened plaque over the malar region or elsewhere around the orbit, seems to always be accompanied by severe photodamage.
The disease mostly affects the face, the back and the chest, and is characterised by non-inflammatory open and closed comedones, and by inflammatory papules and pustules.
Topical retinoids are important tools in the management of acne because they act against comedones and microcomedones, and have direct anti-inflammatory effects.
Acne vulgaris and its associated scarring and comedones (blackheads) are commonly seen in adolescents, but can also occur in adults.
A total of 49 patients met stringent objective criteria for "minimal or nonexistent acne" (defined as zero or only a few scattered comedones or papules, five or fewer postinflammatory macules, and no scars).
Acneform: resembling acne, with pustular eruptions, comedones, blackheads; most clinicians now avoid the term for rashes associated with targeted therapies.
This aggravating condition may be mild comedones (blackheads and whiteheads), moderate inflammatory, with pustules (closed pus-containing pockets) and red pimples or severe (large cysts or nodules) and can result in permanent scarring.
Linear unilateral basal-cell nevus syndrome with comedones.
Whiteheads, or closed comedones, sometimes become problematic as we get older.