Birthmark
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  Birthmark



Birthmark

   A persistent visible mark on the skin that is evident at birth or shortly thereafter. A birthmark is often due to a nevus (a mole) or an hemangioma (a localized collection of small blood vessels).

RELATED TERMS
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Skin
Skin is an organ of the integumentary system; which is composed of a layer of tissues that protect underlying muscles and organs. Skin is used for insulation, vitamin D production, sensation, and excretion (through sweat).

Birthmark
A persistent visible mark on the skin that is evident at birth or shortly thereafter. A birthmark is often due to a nevus (a mole) or an hemangioma (a localized collection of small blood vessels).

Nevus
A general name for birthmarks.

Hemangioma
An extremely common benign tumor, occurring most commonly in infancy and childhood, made up of newly formed blood vessels, and resulting from malformation of angioblastic tissue of fetal life. It can occur anywhere in the body but is most frequently noticed in the skin and subcutaneous tissues. About 75% are present at birth, and about 60% occur in the head and neck area. The majority in infancy will regress spontaneously. Some hemangiomas grow rapidly during the early months of life and may be a source of some concern, although virtually all disappear by about 5 years of age. They do not metastasize and simple excision will often be curative. (Dorland, 27th ed; from Stedman, 25th ed; DeVita Jr et al., Cancer: Principles & Practice of Oncology, 3d ed, p1355)

Blood
The life-maintaining fluid which is made up of plasma, red blood cells (erythrocytes), white blood cells (leukocytes), and platelets; blood circulates through the body's heart, arteries, veins, and capillaries; it carries away waste matter and carbon dioxide, and brings nourishment, electrolytes, hormones, vitamins, antibodies, heat, and oxygen to the tissues.



SIMILAR TERMS
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Birt Hogg Dube syndrome
See: Birt-Hogg-Dube syndrome.

Birt-Hogg-Dube syndrome
An inherited condition in which benign tumors develop in hair follicles on the head, chest, back, and arms. These tumors are called fibrofolliculomas. Other characteristic skin abnormalities are trichodiscomas and acrochordons. A trichodiscoma is a tumor of the hair disc while an acrochordon is a skin tag. People with this syndrome are at increased risk for developing colon or kidney cancer as well as spontaneous pneumothorax due to lung cysts.

Birth canal
The passageway - made up of the cervix, vagina, and vulva - the baby travels through during birth.

Birth cohort
A group of people born during a particular period or year.

Birth control pill
Oral contraceptives are contraceptives which are taken orally and inhibit the body's fertility by chemical means. Female oral contraceptives have been on the market since the early 1960s. Male oral contraceptives remain a subject of research and development, and are not available widely (if at all) to the public. Studies continue of various alternatives, such as gossypol.

Birth control, emergency
See: Emergency contraception.

Birth defect
Any defect present in a baby at birth, irrespective of whether the defect is caused by a genetic factor or by prenatal events that are not genetic.

Birth defects, study of
The study of birth defects is now usually called dysmorphology.

Birth rate
The birth rate is usually given as the number of live births divided by the average population (or the population at midyear). This is termed the crude birth rate.

Birthing room
A place designed and equipped for women giving birth. Some are in hospitals, others are totally separate facilities.



PREVIOUS AND NEXT TERMS
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Birth cohort
A group of people born during a particular period or year.

Birth control, emergency
See: Emergency contraception.

Birth defect
Any defect present in a baby at birth, irrespective of whether the defect is caused by a genetic factor or by prenatal events that are not genetic.

Birth defects, study of
The study of birth defects is now usually called dysmorphology.

Birth rate
The birth rate is usually given as the number of live births divided by the average population (or the population at midyear). This is termed the crude birth rate.

Birthmark

Bis in die (on prescription)
"Seen on a prescription, bid means twice (two times) a day. It is an abbreviation for ""bis in die"" which in Latin means twice a day. The abbreviation bid is sometimes written without a period either in lower-case letters as ""bid"" or in capital letters as ""BID"" or with periods as ""b.i.d."" However it is written, it is one of a number of hallowed abbreviations of Latin terms that have been traditionally used in prescriptions to specify the frequency with which medicines should be taken."

Bisexual suicide risk
"High rates of suicide have consistently been reported among homosexuals, particularly among adolescents and young adults. A 1989 report concluded that ""gay youth are 2 to 3 times more likely to attempt suicide than other young people. They may comprise up to 30% of completed youth suicides annually."""

Biventricular assist device
A ventricular assist device that helps both ventricles of the heart. It helps the right ventricle of the heart to pump blood to the lungs and the left ventricle to pump blood to the body. The Berlin Heart is an example of a biventricular assist device.

BKA
"Acronym standing for ""below knee amputation."" A nurse scrubbing for a BKA is preparing to assist in a below-knee amputation. BKA is as opposed to AKA (above knee amputation)."

Black American
See: African American.

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