Breast Cancer in Dogs Case Studies Paws Claws Animal Hospital

breast cancer on dogs Breast Cancer in Dogs Case Studies Paws Claws Animal Hospital
Breast Cancer

Among all cancers in females, he takes the initial place. In most cases, cancer of the breast 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, and also cancer with the nipple as well as the nipple from the field (Paget's disease from the breast). For the nodular cancers are seen as the node using a diameter of up to several centimeters. In some cases, a strong knot, is permeated with whitish layers tissue penetrating into the surrounding fatty tissue, in other people - a soft, juicy on the cut, splits easily. Diffuse cancer of the prostate is roofed for any considerable distance, the contours in the tumor are marked bad. Sometimes the cancer invades skin and forms for the surface of decaying mushroom formation - a cancerous ulcer. In certain cases, the tumor spreads over the surface in the breast and many types of the iron is covered using a dense shell.

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

• noninvasive: intralobular and intraduct;

• infiltrative.

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

Infiltrating (invasive) cancer is seen as varying levels of tissue and cell irregularities, which able to distinguish different amount of malignancy. This type of cancer include, particularly, infiltrating ductal and lobular carcinoma, which usually has got the structure of scirrhus, in addition to Paget's disease.

Causes of Breast Cancer.

The reasons behind breast cancer often are hormonal changes in the body: the entry into menopause, if you find an energetic restructuring in the hormonal regulation with the woman, the ovaries lose their activity, decreased creation of progesterone and estrogen, our bodies goes through, "hormonal crisis." The mammary gland and endometrium (lining in the uterus) are most understanding of these changes, the breast growth begins to dissolve and be replaced by fat.

Scientifically established that this female hormones estrogen-, plays an integral role in the development of breast cancer. The excess hormones inside body generates a favorable background for developing the condition. The least active hormones estrogen behave when pregnant and after birth - during breastfeeding. It is proved that the birth and prolonged breastfeeding (over 1 year) to cut back the chance of developing cancer of the breast. On the other hand, abortion bring about hormonal "explosion" in a woman's body that could trigger the development of tumors. So far there is no consensus in regards to the impact for the progression of tumors of hormonal contraceptive drugs, however it is believed that these drugs reduce the potential risk of developing cancer of the breast, but increase the potential risk of developing cancer in the female genital organs, and osteoporosis. In addition predisposition to breast cancers might cause harmful environmental factors: the environment, and also inflammatory diseases previously deferred breast - mastitis.

In addition, patients having a family of first-degree relatives with cancer of the breast (mothers and sisters) probability of making a tumor increasing by over half - familial kinds of cancer.

Benign breast diseases for example fibrocystic breast disease, or fibroadenoz intraduct papillomatosis alone do not cause cancer, but concurrently, create an unfavorable background for the development.

The source of cancer of the breast may be the connection between radiation, for example 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 lead to cancer with the breast and female the reproductive system, with the excess dimply skin inside the body, it becomes a different endocrine organ and begins to actively produce hormones-estrogens, whose action and provokes the progression of tumors.

Symptoms of Breast Cancer

There are many forms in the growth of cancer of the breast:

- Nodular form, the commonest, is seen as an a dense knot of 0.5 to 5 cm or maybe more, it can be seen as a all from 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 and symptoms of inflammation: pain of the breast, a bright red colorization from the skin it raises body temperature to 39 degrees C. In view of the symptoms often occur, and errors in proper diagnosis of patients treated for inflammatory diseases, that are named and are described these forms breast cancer. When tubular carcinoma cancer of the breast cover being a "skin" of the company's contracting and decreasing in size.

In certain cases, cancer of the breast manifests inside 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 in the breast, any symptoms arise. The most observant women and their husbands can easily detect tumor site within the gland unintentionally, but in a large breast to detect small size hard knot. Revealed a knot can 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, can be firmly fixed to the surrounding tissue or skin, usually painless, can reach a significant size (over 3 - 5 cm and infrequently 10-15 cm).

Need to assess the surface of the skin on the tumor: the malignant process will likely be observed retraction with the skin, collecting inside folds, wrinkles, an indicator of "lemon peel" - a nearby swelling with the skin on the tumor, may be a direct tumor invasion to the skin surface, then it becomes a bright beautiful red colors and sprawl as "cauliflower."

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