PurrViews: Breast Tumors in Dogs

breast cancer on dogs PurrViews: Breast Tumors in Dogs
Breast Cancer

Among all cancers in females, he takes the ultimate place. In most cases, breast cancers develops within the presence of precancerous changes. This is primarily a benign mammary dysplasia and papilloma ducts.

Breast cancer is represented macroscopically nodular and diffuse forms, as well as cancer from the nipple as well as the nipple of the field (Paget's disease from the breast). For the nodular cancers are seen as a the node having a diameter all the way to several centimeters. In some instances, a good knot, is permeated with whitish layers tissue penetrating in the surrounding fat, on other occasions - a soft, juicy on the cut, splits easily. Diffuse prostate cancer is roofed to get a considerable distance, the contours of the tumor are marked bad. Sometimes the cancer invades the skin and forms about the surface of decaying mushroom formation - a cancerous ulcer. In some cases, the tumor spreads across the surface from the breast and many types of the iron is roofed using a dense shell.

In histological structure include the following forms of breast cancer:

• 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 seen as varying degrees of tissue and cell irregularities, which able to distinguish different level of malignancy. This type of cancer include, specifically, infiltrating ductal and lobular carcinoma, which often gets the structure of scirrhus, along with Paget's disease.

Causes of Breast Cancer.

The causes of breast cancers often are hormonal changes within the body: the entry into menopause, should there be an engaged restructuring of the hormonal regulation in the woman, the ovaries lose their activity, decreased production of progesterone and estrogen, the body is certainly going through, "hormonal crisis." The mammary gland and endometrium (lining from the uterus) are most responsive to these changes, the breast growth begins to dissolve and stay replaced by fat.

Scientifically established the female hormones estrogen-, plays an integral role inside continuing development of breast cancer. The excess hormones inside 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 the birth and prolonged breastfeeding (greater than one year) to cut back the risk of developing cancer of the breast. On the other hand, abortion result in hormonal "explosion" in the woman's body that could trigger the progression of tumors. So far there is absolutely no consensus regarding the impact for the continuing development of tumors of hormonal contraceptive drugs, but it is thought that these drugs reduce potential risk of developing breast cancer, but increase the potential risk of developing cancer from the female genital organs, and osteoporosis. In addition predisposition to cancer of the breast may cause harmful environmental factors: the surroundings, and also inflammatory diseases previously deferred breast - mastitis.

In addition, patients with a family of first-degree relatives with breast cancer (mothers and sisters) likelihood of making a tumor increasing by a lot more than half - familial varieties of cancer.

Benign breast diseases including fibrocystic breast disease, or fibroadenoz intraduct papillomatosis alone tend not to bring about cancer, but simultaneously, create an unfavorable background for the development.

The source of breast cancer could be the results of radiation, for example irradiation of 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 of the breast and female reproductive :, with an excess fat within the body, it will become a separate endocrine organ and actually starts to actively produce hormones-estrogens, whose action and provokes the progression of tumors.

Symptoms of Breast Cancer

There are a couple of forms in the growth of breast cancers:

- Nodular form, the most common, is seen as a a dense knot of 0.5 to 5 cm or higher, it really is seen as an all with the following symptoms;

- Diffuse. All of them are very aggressive, grow quickly, almost lightning speed, the tumor without clear boundaries, "spreading" from the breast and skin. For the first two forms are characteristic signs of inflammation: pain with the breast, a bright red colorization with the skin it raises body temperature to 39 degrees C. In view of the symptoms often occur, and errors in diagnosis of patients treated for inflammatory diseases, that are named and therefore are known as these forms breast cancers. When tubular carcinoma breast cancers cover like a "skin" of the company's contracting and decreasing in space.

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

For small tumors in the breast, any symptoms arise. The most observant women and their husbands can easily detect tumor site within the gland by chance, but in a very large breast to detect small size hard knot. Revealed a knot may be painful when pressed, round, smooth and agile, this speaks in favor of a benign tumor. Signs of malignancy other: a decent knot to touch the stone, its surface is uneven, it is stationary or slightly shifted, can be firmly fixed for the surrounding tissue or skin, usually painless, can reach an important size (greater than three to five cm and sometimes 10-15 cm).

Need to gauge the surface in the skin on the tumor: the malignant process will likely be observed retraction with the skin, picking up inside the folds, wrinkles, an indicator of "lemon peel" - a local swelling with the skin over the tumor, may be a direct tumor invasion to the skin surface, then it becomes a bright red color and sprawl as "cauliflower."

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