comedo


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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.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

com·e·do

, pl.

com·e·dos

,

com·e·do·nes

(kom'ē-dō, kō-mē'dō; kom'ē-dōz; kom-ē-dō'nēz), The correct singular form is comedo, not comedone.
A dilated hair follicle infundibulum filled with keratin squamae, bacteria, particularly Propionibacterium acnes, and sebum; the primary lesion of acne vulgaris.
[L. a glutton, fr. com-edo, to eat up]
Farlex Partner Medical Dictionary © Farlex 2012

comedo

(kŏm′ĭ-dō′)
n. pl. come·dos or come·dones (-dō′nēz)
The primary lesion of acne vulgaris, consisting of a hair follicle that is occluded with sebum and keratin; a blackhead or whitehead.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

comedo

Blackhead, plural comedones Dermatology A plug of keratin and sebum within the dilated orifice of a hair follicle, which may contain bacteria–eg, Propionibacterium acnes, P granulosum, Staphylococcus albus, or yeast, Pityrosporon ovale. See Acne. Cf Comedocarcinoma.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

com·e·do

, pl. comedones (kom'ĕ-dō, dō'nēz)
A dilated hair follicle infundibulum filled with keratin squamae, bacteria, particularly Propionibacterium acnes, and sebum; the primary lesion of acne vulgaris.
[L. a glutton, fr. com-edo, to eat up]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
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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.
See: illustrationillustration
Medical Dictionary, © 2009 Farlex and Partners

Comedo

A hard plug composed of sebum and dead skin cells. The mildest type of acne.
Mentioned in: Acne
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
The Krasr team admitted to be still in shock with the Comedo Suction Microdemabrasion Machine's sudden rise to popularity.
Tumor characteristics, such as size, grade, and comedo status, were not strongly associated with initiation in our study.
Histological analysis of the specimen demonstrated extensive DCIS (comedo type).
Comedo DCIS is associated with areas of necrosis (debris) within the cancer cells.
Mammary 'comedo' DCIS: apoptosis, oncosis and necrosis: an electron microscopic examination of 8 cases.
(28) Altogether, these events may influence one or more of the four underlying causes of acne: (i) increased proliferation of basal keratinocytes within the pilosebaceous duct; (ii) abnormal desquamation of follicular corneocytes; (iii) androgen-mediated increases in sebum production; and (iv) colonisation and inflammation of the comedo by Propionibacterium acnes.
The median comedo lesion count dropped by 70% at 12 weeks in the combined treatment group, significantly better than the 60% decline in the retinoid monotherapy arm.
The cribriform lesions did as badly as the solid or comedo lesions," she added.
A BLACKHEADS - or comedo, to give them their proper name - are caused by a build-up of secretions in the pores that turn black because of dirt on the skin.
Tumor necrosis is classified as either comedo necrosis or punctate necrosis.
The basic acne lesion, called the comedo (kom'-e-do) or comedone, is simply an enlarged hair follicle plugged with oil and bacteria.