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 ?
Both cases are consistent with a clinical diagnosis of postherpetic comedones that can be explained by Wolf's PHIR.
Among the list of possible diagnoses in patients with early HS lesions based on clinical appearance alone, the most common and most likely are furuncles, folliculitis, and atypically dilated comedones of acne vulgaris.
Las pustules y papulas sin comedones asociadas a eritema en area central de la cara pero en menor proporcion a la rosacea ERT son las manifestaciones de esta variedad de la enfermedad.
For instance, the fraction of patients without any signs of inflammation had more than quadrupled and the proportion of patients with > 20 comedones was reduced from 53.
Comedones can be open (no overlying skin, known as blackheads) or closed (with a thin layer of overlying skin, known as whiteheads).
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.
Los puntos negros son comedones con 'clavo' central negro, mientras que los puntos blancos tienen el centro blanco.
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.
Abnormal follicular cell cycles are believed to play a major role in plugging sebaceous follicles and causing comedones to form.