breast cancer on dogs breast cancer Archives Dr. Ryan Llera Kingston Ontario Veterinarian
Breast Cancer

Among all cancers in women, he takes the ultimate place. In most cases, breast cancers develops inside 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 of the nipple along with the nipple with the field (Paget's disease from the breast). For the nodular cancers are seen as a the node creating a diameter of up to several centimeters. In certain instances, a decent knot, is permeated with whitish layers tissue penetrating into the surrounding dimply skin, in others - a soft, juicy around the cut, splits easily. Diffuse prostate cancer is roofed for the considerable distance, the contours in the tumor are marked bad. Sometimes the cancer invades your skin and forms around the surface of decaying mushroom formation - a cancerous ulcer. In certain cases, the tumor spreads over the surface in the breast and the iron is roofed with a dense shell.

In histological structure are the following forms of breast cancers:

• noninvasive: intralobular and intraduct;

• infiltrative.

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

Infiltrating (invasive) cancer is characterized by varying levels of tissue and cell irregularities, which able to distinguish different a higher level malignancy. This type of cancer include, specifically, infiltrating ductal and lobular carcinoma, which in turn has the structure of scirrhus, and also Paget's disease.

Causes of Breast Cancer.

The causes of cancer of the breast often are hormonal changes inside the body: the entry into menopause, should there be an active restructuring in the hormonal regulation from the woman, the ovaries lose their activity, decreased manufacture of progesterone and estrogen, the body is going through, "hormonal crisis." The mammary gland and endometrium (lining from the uterus) are most tuned in to these changes, the breast tissue begins to dissolve and turn into replaced by fat.

Scientifically established that this female hormones estrogen-, plays a key role in the growth and development of breast cancer. The excess hormones within the body creates a favorable background for developing the condition. The least active hormones estrogen behave in pregnancy and after birth - during breastfeeding. It is proved that the birth and prolonged breastfeeding (more than 12 months) to relieve the risk of developing breast cancer. On the other hand, abortion lead to hormonal "explosion" in a very woman's body that can trigger the development of tumors. So far there isn't any consensus in regards to the impact about the continuing development of tumors of hormonal contraceptive drugs, but it's belief that these drugs reduce potential risk of developing breast cancers, but increase the potential risk of developing cancer in the female genital organs, and osteoporosis. In addition predisposition to breast cancers may cause harmful environmental factors: the planet, as well as inflammatory diseases previously deferred breast - mastitis.

In addition, patients which has a group of first-degree relatives with breast cancer (mothers and sisters) risk of making a tumor increasing by greater than half - familial kinds of cancer.

Benign breast diseases including fibrocystic breast disease, or fibroadenoz intraduct papillomatosis alone usually do not cause cancer, but at the same time, create an unfavorable background due to the development.

The reason behind cancer of the breast will be the outcomes of radiation, including irradiation from 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 result in cancer with the breast and female reproductive system, with an excess dimply skin inside body, it becomes a separate endocrine organ and begins to actively produce hormones-estrogens, whose action and provokes the growth and development of tumors.

Symptoms of Breast Cancer

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

- Nodular form, the most typical, is seen as an a dense knot of 0.5 to five cm or even more, it can be seen as an all of the following symptoms;

- Diffuse. All of them are very aggressive, grow quickly, almost lightning speed, the tumor with no clear boundaries, "spreading" of the breast and skin. For the first couple of forms are characteristic signs of inflammation: pain in the breast, a bright red color in the skin it raises temperature to 39 degrees C. In view of those symptoms often occur, and errors in proper diagnosis of patients treated for inflammatory diseases, which are named and so are known these forms breast cancers. When tubular carcinoma cancer of the breast cover as being a "skin" of its contracting and decreasing in size.

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In some instances, cancer of the breast manifests inside the form of metastases inside the lymph nodes around the affected side, often does not detect the tumor itself - show hidden breast cancers.

For small tumors of the breast, any symptoms arise. The most observant females and their husbands have the ability to detect tumor site within the gland accidentally, but in a very large breast to detect small size hard knot. Revealed a knot could be painful when pressed, round, smooth and agile, this speaks for a benign tumor. Signs of malignancy other: a tight knot to touch the stone, its surface is uneven, it can be stationary or slightly shifted, can be firmly fixed on the surrounding tissue or skin, usually painless, can reach a tremendous size (a lot more than three to five cm and infrequently 10-15 cm).

Need to evaluate the surface of the skin over the tumor: the malignant process will probably be observed retraction from the skin, obtaining in the folds, wrinkles, a symptom of "lemon peel" - an area swelling in the skin in the tumor, is often a direct tumor invasion to your skin layer surface, then it is a bright beautiful red colors and sprawl as "cauliflower."