comedo

(redirected from comedones)
Also found in: Dictionary, Thesaurus, Medical.

comedo

[′kä·mə‚dō]
(medicine)
A collection of sebaceous material and keratin retained in the hair follicle and excretory duct of the sebaceous gland, whose surface is covered with a black dot caused by oxidation of sebum at the follicular orifice. Also known as blackhead.
References in periodicals archive ?
The patient reported no previous history of comedones and acnes.
PAPULES & PUSTULES Papules are comedones that have become inflamed, forming a sore small red or pink bump.
Acneiform papules and open comedones with two or more "heads" (double comedones) are also typical (Figure 2).
At the end of the trial, after eight weeks, both groups of teenagers showed a reduction in inflammatory spots and comedones (blackheads and whiteheads)
A Acne is a very common skin condition characterised by comedones (blackheads and whiteheads) and pus-filled spots (pustules).
Among adult females with acne, 85% have large and small comedones, with few inflammatory lesions, a study has shown.
La rosacea es una enfermedad cronica recidivante que afecta en forma principal la cara y se caracteriza por la aparicion de eritema centrofacial que comprende la nariz, region malar, menton y region central de las cejas; posteriormente puede asociarse a aparicion de papulas, pustulas y placas en ausencia de comedones.
Whilst the etiogenesis of the condition is multifactorial, the bacterium Propionibacterium acnes plays an important role in the formation of comedones and via the induction of inflammatory cytokines from monocytes.
Acne is a persistent dermatological disorder that is characterised by the formation of lesions such as comedones, papules, pustules, and cysts mainly located on the face, and less commonly on the back and chest.
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.
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.