comedones


Also found in: Dictionary, Thesaurus, Encyclopedia.

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.
Enlarge picture
COMEDONES
Enlarge picture
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.
See: illustrationillustration
References in periodicals archive ?
At baseline mean of total acne score (acne score of comedones, papules and pustules) was 30.57+-13.62 and 30.90+-17.17 in group A and B, respectively.
Histopathological examination from a biopsy specimen of the perianal skin revealed multiple open comedones, characterized by a dilated follicular infundibulum with a wide patulous opening and a thin epithelial lining.
Acne vulgaris is a chronic, inflammatory disease of pilosebaceous units, characterized by comedones, papules, pustules, nodules, and often scars.
The patient reported no previous history of comedones and acnes.
Comedones are subdivided into blackheads and whiteheads.
- Comedo Extraction: It may temporarily help those with comedones that do not improve with standard treatment.
PAPULES & PUSTULES Papules are comedones that have become inflamed, forming a sore small red or pink bump.
You're also not creating any environment for comedones to appear on skin," Felecia adds.
Unlike acne keloidalis, it is characterized by the presence of comedones. (1,3)
Both a 'wet shave' and an electric razor can easily take the tops off inflammatory 'comedones', as the spots on the face and neck are known, making them even more obvious.
Initially, HS manifests with open comedones (usually with two or more "heads") and tender subcutaneous acneiform papules.