Canine Breast Cancer

breast cancer on dogs Canine Breast Cancer
Breast Cancer

Among all cancers ladies, he takes the first place. In most cases, cancer of the breast develops inside the presence of precancerous changes. This is primarily a benign mammary dysplasia and papilloma ducts.

Breast cancer is represented macroscopically nodular and diffuse forms, in addition to cancer with the nipple along with the nipple in the field (Paget's disease in the breast). For the nodular cancers are seen as an the node developing a diameter up to several centimeters. In certain cases, a strong knot, is permeated with whitish layers tissue penetrating into the surrounding fatty tissue, on other occasions - a soft, juicy for the cut, splits easily. Diffuse prostate cancer is roofed for any considerable distance, the contours with the tumor are marked bad. Sometimes the cancer invades skin and forms around the surface of decaying mushroom formation - a cancerous ulcer. In some cases, the tumor spreads across the surface of the breast and the iron is roofed having a dense shell.

In histological structure will be the following varieties of cancer of the breast:

• noninvasive: intralobular and intraduct;

• infiltrative.

Noninvasive breast cancer could be intralobular (lobular carcinoma in situ), and intraduct (ductal carcinoma in situ).

Infiltrating (invasive) cancer is characterized by varying examples of tissue and cell irregularities, which able to distinguish different degree of malignancy. This type of cancer include, in particular, infiltrating ductal and lobular carcinoma, which will contains the structure of scirrhus, along with Paget's disease.

Causes of Breast Cancer.

The reasons behind breast cancer often are hormonal changes inside body: the entry into menopause, when there is an engaged restructuring with the hormonal regulation in the woman, the ovaries lose their activity, decreased creation of progesterone and estrogen, the body is going through, "hormonal crisis." The mammary gland and endometrium (lining with the uterus) are most attentive to these changes, the breast tissue starts to dissolve and stay replaced by fat.

Scientifically established that this female hormones estrogen-, plays an important role within the continuing development of breast cancers. The excess hormones inside the body produces a favorable background for developing the sickness. The least active hormones estrogen behave during pregnancy and after birth - during breastfeeding. It is proved that this birth and prolonged breastfeeding (greater than twelve months) to relieve potential risk of developing breast cancer. On the other hand, abortion result in hormonal "explosion" inside a woman's body that could trigger the growth and development of tumors. So far there is absolutely no consensus about the impact about the continuing development of tumors of hormonal contraceptive drugs, yet it's believed that these drugs reduce potential risk of developing breast cancer, but increase the risk of developing cancer of the female genital organs, and osteoporosis. In addition predisposition to breast cancer may cause harmful environmental factors: environmental surroundings, and also inflammatory diseases previously deferred breast - mastitis.

In addition, patients using a family of first-degree relatives with breast cancer (mothers and sisters) probability of having a tumor increasing by greater than half - familial forms of cancer.

Benign breast diseases including fibrocystic breast disease, or fibroadenoz intraduct papillomatosis alone don't cause cancer, but as well, create an unfavorable background for the development.

The reason behind breast cancers could be the results of radiation, like irradiation with the chest for other diseases (lung tumors, the lymphatic system), prolonged and frequent chest X-ray studies on inflammatory diseases or pulmonary tuberculosis.

Constitutional obesity can bring about cancer from the breast and female the reproductive system, with an excess dimply skin inside the body, it might be another endocrine organ and begins to actively produce hormones-estrogens, whose action and provokes the development of tumors.

Symptoms of Breast Cancer

There are several forms in the growth of breast cancers:

- Nodular form, the commonest, is characterized by a dense knot of 0.5 to 5 cm or higher, it can be seen as all from the following symptoms;

- Diffuse. All of them are very aggressive, grow quickly, almost lightning speed, the tumor without having clear boundaries, "spreading" in the breast and skin. For the first couple of forms are characteristic indications of inflammation: pain of the breast, a bright red colorization from the skin it raises body's temperature to 39 degrees C. In view of such symptoms often occur, and errors in diagnosis of patients treated for inflammatory diseases, that happen to be named and are known these forms breast cancer. When tubular carcinoma breast cancers cover being a "skin" of their contracting and decreasing in size.

In certain cases, breast cancers manifests in the form of metastases inside lymph nodes about the affected side, often ceases to detect the tumor itself - show hidden cancer of the breast.

For small tumors in the breast, any symptoms arise. The most observant females and their husbands are able to detect tumor site inside the gland by chance, but inside a large breast to detect small size hard knot. Revealed a knot might be painful when pressed, round, smooth and agile, this speaks and only a benign tumor. Signs of malignancy other: a strong knot to touch the stone, its surface is uneven, it's stationary or slightly shifted, might be firmly fixed towards the surrounding tissue or skin, usually painless, can reach a significant size (over 3 - 5 cm and infrequently 10-15 cm).

Need to gauge the surface in the skin in the tumor: the malignant process will be observed retraction in the skin, buying within the folds, wrinkles, a signal of "lemon peel" - a neighborhood swelling with the skin within the tumor, can be a direct tumor invasion to your skin surface, then it is a bright beautiful red colors and sprawl as "cauliflower."

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