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Comedones
Comedones The plural of comedo, the primary sign of acne, consisting of a dilated (widened) hair follicle filled with keratin squamae (skin debris), bacteria, and sebum (oil). Comedones may be closed or open.
RELATED TERMS--------------------------------------
Comedo
See blackhead.
Sign
An objective manifestation of a pathological condition. Signs are observed by the examiner rather than reported by the affected individual.
Acne
Is a common inflammatory disease of the facial skin seen most frequently between the ages of 10 and 25 years and characterized by blackheads, whiteheads and blemishes composed of papules and pustules. Acne is an inflammatory disease of the sebaceous glands, the glands that produce sebum. Acne usually affects the face, back, and chest. In severe cases it can develop into cysts and nodules that can result in scarring. While its cause is unknown, it is most often associated with hormonal activity within teenagers. In severe cases a person should consult with a dermatologist for a specific acne treatment.
Follicle
The tiny shaft in the skin through which a hair grows, and sebum is excreted from sebaceous glands to the surface of the skin.
Keratin
The main protein of skin, hair and nails.
Bacteria
Single-celled microorganisms which can exist either as independent (free-living) organisms or as parasites (dependent upon another organism for life).
Sebum
The oily substance produced by sebaceous glands.
Comedones
The plural of comedo, the primary sign of acne, consisting of a dilated (widened) hair follicle filled with keratin squamae (skin debris), bacteria, and sebum (oil). Comedones may be closed or open.
SIMILAR TERMS--------------------------------------
Comedo
See blackhead.
Comedone
Commonly know as black heads or white heads. This is where a hair follicle becomes plugged with sebum. When the lipid or sebum is exposed to the environment it is oxidized an turns black (black heads). When the follicle is closed and not exposed to the environment they are cream colored (white heads).
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Colporrhaphy
Surgical repair of the vagina.
Colposcope
A lighted magnifying instrument used by a gynecologist to examine the tissues of the vagina and the cervix. The procedure is called colposcopy.
Colpotomy
A surgical incision in the vagina. The -tomy part of the word comes from the Greek tome meaning cutting.
Coma, diabetic
Coma in a diabetic due to the buildup of ketones in the bloodstream. Ketones are a product of metabolizing (using) fats rather than the sugar glucose for energy.
Combined oral contraceptive
"Commonly called ""the pill,"" combined oral contraceptives are the most commonly used form of reversible birth control in the United States. This form of birth control suppresses ovulation (the monthly release of an egg from the ovaries) by the combined actions of the hormones estrogen and progestin."
Comedones
Commensal
1. Living in a relationship in which one organism derives food or other benefits from another organism without hurting or helping it. Commensal bacteria are part of the normal flora in the mouth. 2. An intimate relationship. The Norway rat, roof rat, and house mouse are considered commensal rodents because of their intimate relationships with humans.
Comminuted fracture
A fracture in which bone is broken, splintered or crushed into a number of pieces.
Common acute lymphocytic leukemia antigen
(CALLA) A cell surface enzyme with neutral metalloendopeptidase activity that serves as a marker for the common form of ALL (acute lymphocytic leukemia) as well as for Burkitt lymphoma and follicular germinal center lymphoma. CALLA is normally present on the surface of early lymphoid cells as well as on a number of other types of normal cells, such as especially cells in the kidney.
Common cold
A viral upper respiratory tract infection. This contagious illness can be caused by many different types of viruses, and the body can never build up resistance to all of them. For this reason, colds are a frequent and recurring problem. In fact kindergarten children average 12 colds per year, while adolescents and adults have around seven colds per year.
Common hepatic duct
The duct formed by the junction of the right hepatic duct (which drains bile from the right half of the liver) and the left hepatic duct (which drains bile from the left half of the liver). The common hepatic duct then joins the cystic duct coming from the gallbladder to form the common bile duct.
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