b****t cancer is a disease in which malignant (cancer) cells form in the tissues of the b****t.
The b****t is made up of lobes and ducts. Each b****t has 15 to 20 sections called lobes, which have many smaller sections called lobules. The lobes and lobules are connected by thin tubes called ducts.
Each b****t also contains blood vessels and lymph vessels. The lymph vessels carry an almost colorless fluid called lymph. The lymph vessels lead to small, bean-shaped organs called lymph nodes that help the body fight infection and disease. Lymph nodes are found throughout the body. Clusters of lymph nodes are found near the b****t in the axilla (under the arm), above the collarbone, and in the chest.
b****t cancer is sometimes detected (found) in women who are pregnant or have just given birth.
In women who are pregnant or who have just given birth, b****t cancer occurs most often between the ages of 32 and 38. b****t cancer occurs about once in every 3,000 pregnancies.
It may be difficult to detect (find) b****t cancer early in pregnant or nursing women, whose b****ts are often tender and swollen.
Women who are pregnant, nursing, or have just given birth usually have tender, swollen b****ts. This can make small lumps difficult to detect and may lead to delays in diagnosing b****t cancer. Because of these delays, cancers are often found at a later stage in these women.
b****t examination should be part of prenatal and postnatal care.
To detect b****t cancer, pregnant and nursing women should examine their b****ts themselves. Women should also receive clinical b****t examinations during their routine prenatal and postnatal examinations.
Tests that examine the b****ts are used to detect (find) and diagnose b****t cancer.
If an abnormality is found, one or all of the following tests may be used:
Ultrasound exam: A procedure in which high-energy sound waves (ultrasound) are bounced off internal tissues or organs and make echoes. The echoes form a picture of body tissues called a sonogram. Mammogram: An x-ray of the b****t. A mammogram can be performed with little risk to the fetus. Mammograms in pregnant women may appear negative even though cancer is present.
Biopsy: The removal of cells or tissues by a pathologist so they can be viewed under a microscope to check for signs of cancer. Certain factors affect prognosis (chance of recovery) and treatment options.
The prognosis (chance of recovery) and treatment options depend on the following:
The stage of the cancer (whether it is in the b****t only or has spread to other places in the body). The size of the tumor. The type of b****t cancer. The age of the fetus. Whether there are symptoms. The patients general health. Stages of b****t Cancer After b****t cancer has been diagnosed, tests are done to find out if cancer cells have spread within the b****t or to other parts of the body.
The process used to find out if the cancer has spread within the b****t or to other parts of the body is called staging. The information gathered from the staging process determines the stage of the disease. It is important to know the stage in order to plan treatment. (Refer to the PDQ summary on b****t Cancer Treatment for more information on the stages used for b****t cancer.)
Methods used to stage b****t cancer can be changed to make them safer for the fetus.
Standard methods for giving imaging scans can be adjusted so that the fetus is exposed to less radiation. Tests to measure the level of hormones in the blood may also be used in the staging process.
Treatment Option Overview There are different types of treatment for patients with b****t cancer.
Different types of treatment are available for patients with b****t cancer. Some treatments are standard (the currently used treatment), and some are being tested in clinical trials. Before starting treatment, patients may want to think about taking part in a clinical trial. A treatment clinical trial is a research study meant to help improve current treatments or obtain information on new treatments for patients with cancer. When clinical trials show that a new treatment is better than the standard treatment, the new treatment may become the standard treatment.
Clinical trials are taking place in many parts of the country. Information about ongoing clinical trials is available from the NCI Web site. Choosing the most appropriate cancer treatment is a decision that ideally involves the patient, family, and health care team.
Treatment options for pregnant women depend on the stage of the disease and the age of the fetus. Three types of standard treatment are used: Surgery
Most pregnant women with b****t cancer have surgery to remove the b****t. Some of the lymph nodes under the arm are usually taken out and looked at under a microscope to see if they contain cancer cells.
Types of surgery to remove the b****t include:
Simple mastectomy: A surgical procedure to remove the whole b****t that contains cancer. Some of the lymph nodes under the arm may also be removed for biopsy. This procedure is also called a total mastectomy.
Modified radical mastectomy: A surgical procedure to remove the whole b****t that has cancer, many of the lymph nodes under the arm, the lining over the chest muscles, and sometimes, part of the chest wall muscles.
b****t-conserving surgery, an operation to remove the cancer but not the b****t itself, includes the following:
Lumpectomy: A surgical procedure to remove a tumor (lump) and a small amount of normal tissue around it. Most doctors also take out some of the lymph nodes under the arm. Partial mastectomy: A surgical procedure to remove the part of the b****t that contains cancer and some normal tissue around it. Some of the lymph nodes under the arm may also be removed for biopsy. This procedure is also called a segmental mastectomy.
Even if the doctor removes all of the cancer that can be seen at the time of surgery, the patient may be given radiation therapy, chemotherapy, or hormone therapy after surgery to try to kill any cancer cells that may be left. Treatment given after surgery to increase the chances of a cure is called adjuvant therapy.
Radiation therapy
Radiation therapy is a cancer treatment that uses high-energy x-rays or other types of radiation to kill cancer cells. There are two types of radiation therapy. External radiation therapy uses a machine outside the body to send radiation toward the cancer. Internal radiation therapy uses a radioactive substance sealed in needles, seeds, wires, or catheters that are placed directly into or near the cancer. The way the radiation therapy is given depends on the type and stage of the cancer being treated.
Radiation therapy should not be given to pregnant women with early stage (stage I or II) b****t cancer because it can harm the fetus. For women with late stage (stage III or IV) b****t cancer, it should not be given during the first 3 months of pregnancy
Chemotherapy
Chemotherapy is a cancer treatment that uses drugs to stop the growth of cancer cells, either by killing the cells or by stopping the cells from dividing. When chemotherapy is taken by mouth or injected into a vein or muscle, the drugs enter the bloodstream and can reach cancer cells throughout the body (systemic chemotherapy). When chemotherapy is placed directly into the spinal column, an organ, or a body cavity such as the abdomen, the drugs mainly affect cancer cells in those areas (regional chemotherapy). The way the chemotherapy is given depends on the type and stage of the cancer being treated.
Chemotherapy should not be given during the first 3 months of pregnancy. Chemotherapy given after this time does not usually harm the fetus but may cause early labor and low birth weight.
New types of treatment are being tested in clinical trials. These include the following: Hormone therapy
Hormone therapy is a cancer treatment that removes hormones or blocks their action and stops cancer cells from growing. Hormones are substances produced by glands in the body and circulated in the bloodstream. Some hormones can cause certain cancers to grow. If tests show that the cancer cells have places where hormones can attach (receptors), drugs, surgery, or radiation therapy are used to reduce the production of hormones or block them from working.
The effectiveness of hormone therapy, alone or combined with chemotherapy, in treating b****t cancer in pregnant women is not yet known.
This summary section refers to specific treatments under study in clinical trials, but it may not mention every new treatment being studied. Information about ongoing clinical trials is available from the NCI Web site.
Ending the pregnancy does not seem to improve the mothers chance of survival and is not usually a treatment option.
If the cancer must be treated with chemotherapy and radiation therapy, which may harm the fetus, ending the pregnancy is sometimes considered. This decision may depend on the stage of cancer, the age of the fetus, and the mothers chance of survival.
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