breast

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breast:

see mammary glandmammary gland,
organ of the female mammal that produces and secretes milk for the nourishment of the young. A mammal may have from 1 to 11 pairs of mammary glands, depending on the species. Generally, those mammals that bear larger litters have more glands.
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Breast

The human mammary gland, usually well developed in the adult female but rudimentary in the male. Each adult female breast contains 15–20 separate, branching glands that radiate from the nipple. During lactation their secretions are discharged through separate openings at the base of the nipple.

In the female, hormonal changes in adolescence cause enlargement of breast tissue, but much of this is connective tissue although some glandular buds form. With the advent of full menstruation ovarian estrogenic hormones influence breast development. If pregnancy ensues, the glandular tissue reaches full development and full lactation begins shortly after birth. After cessation of lactation the breasts regress considerably and once again reflect cyclic regulation. See Lactation

Breast disorders may result from congenital or developmental abnormalities, inflammations, hormonal imbalances, and, most important, from tumor formation.

Congenital defects are usually unimportant except for their psychic or cosmetic implications. Supernumerary nipples and breasts or accessory breast tissue are common examples.

Inflammations are not encountered frequently and usually result from a staphylococcal or streptococcal invasion incurred during lactation. A special form of inflammation may result from fat necrosis. Although any age is susceptible, older women show a slightly higher incidence of fat necrosis, the commonest cause of which is injury from trauma. See Staphylococcus, Streptococcus, Syphilis, Tuberculosis

Hormonal imbalances are believed to be responsible for the variants of the commonest nontumorous breast disorder of women, cystic hyperplasia. The changes are thought to result from exaggeration or distortion of the normal cyclic alterations induced during the menstrual interval. Although a wide range of clinical and pathologic variation is commonplace, three major types or tendencies prevail. The first, called fibrosis or mastodynia, is marked by an increase of connective tissue in the breast, without a proportionate increase in glandular epithelium. The second, cystic disease, is characterized by an increase in the glandular and connective tissues in local areas, with a tendency toward formation of cysts varying in size. The third major type is adenosis, in which glandular hyperplasia is predominant. Each major form of cystic hyperplasia has its own clinical characteristics, ages of highest incidence, and distribution. Each is important because the breast masses which occur require differentiation from benign and malignant tumors. These lesions also have been found to predispose to the subsequent development of carcinoma.

Breast cancer is the most significant lesion of the female breast, accounting for 25,000–30,000 deaths in the United States each year. It rarely occurs before the age of 25, but its incidence increases each year thereafter, with a sharper climb noted about the time of menopause. Early breast cancer may appear as a small, firm mass which is nontender and freely movable. Diagnosis at this time carries a more favorable prognosis than later, when immobility, nipple retraction, lymph node involvement, and other signs of extension or spread are noted. Paget's disease of the nipple is a special form of breast cancer, in which there are early skin changes about the nipple. See Hormone

Breast

That portion of a wall between the floor and a window above; a defensive wall built about breast high.

breast

[brest]
(anatomy)
The human mammary gland.
(mining engineering)
In coal mines, a chamber driven in the seam from the gangway, for the extraction of coal.

breast

1. A projecting part of a wall, as at a chimney.
2. That portion of a wall between the floor and a window above.
3. The underside of a handrail, beam, rafter, or the like.

breast

symbol of nourishment and fecundity. [Ren. Art: Hall, 52]

breast

1. the front part of the body from the neck to the abdomen; chest
2. either of the two soft fleshy milk-secreting glands on the chest in sexually mature human females
3. a similar organ in certain other mammals
4. a projection from the side of a wall, esp that formed by a chimney

Breasts

(dreams)
Dreaming about breasts can have obvious sexual meaning. However, consider all of the details in your dream in order to obtain the most appropriate meaning. Breasts also represent tenderness, love, and other matters of the heart. Breastfeeding is symbolic of giving or receiving, nurturing, and sustenance. It represents motherly love as well as physical and emotional support and well being. Old dream interpretation books say that breastfeeding is a symbol of great things to come following an extended period of hard work.
References in periodicals archive ?
Dense breast tissue makes it more difficult to detect cancer, since both lesions and dense tissue appear white on a mammogram.
Comment: Due to these data, and some assertive women's health scientists and activists, certain states now require that women found to have dense breast tissue on screening mammography be provided a letter informing them of these findings and then encouraged to follow up with their primary-care provider to discuss risk and screening guidelines.
The results of this research highlight an opportunity to further encourage awareness of dense breast tissue and empower women to take an active role in their breast health, said Dr.
These levels of parabens in human breast tissue are suggested to be from low-level dermal absorption from personal care products.
An ultrasound examination of the left thigh was consistent with mixed density breast tissue but no evidence of malignancy.
Women who have had a previous breast intervention such as surgery or biopsy generally would not be eligible for screening with the device, the agency wrote, "since this might alter the appearance of breast tissue in an ultrasound image.
But that broke with national guidelines, which warn that leaving excess breast tissue could increase the risk of the cancer returning.
Gynecomastia is observed as a proliferation of breast tissue on CT and as dense breast tissue on mammography.
0-mg doses to effectively treat fibrocystic breast disease may reveal an important role for iodine in maintaining normal breast tissue architecture and function.
While the original mammograms were performed on regular X-ray equipment that was not ideally suited for a woman's breast, their introduction gave doctors a much greater ability to view a woman's breast tissue with the goal of identifying cancerous calcifications (lumps) at an early stage.
The reconstructed images demonstrate significant tumor contrast compared with typical optical contrast in breast tissue.
This is because mammograms are not as effective in pre-menopausal women as the density of the breast tissue makes it more difficult to detect problems.