Breast Cancer: Just The Facts ...
Breast cancer is the most common cancer in women in the United States, aside from skin cancer. According to the American Cancer Society (ACS), an estimated 192,370 new cases of invasive breast cancer are expected to be diagnosed among women in the United States this year. An estimated 40,170 women are expected to die from the disease in 2009 alone. Today, there are about 2.5 million breast cancer survivors living in the United States.
If you're worried about developing breast cancer, or if you know someone who has been diagnosed with the disease, one way to deal with your concerns is to get as much information as possible.
Breast cancer is a malignant tumor that grows in one or both of the breasts. Breast cancer usually develops in the ducts or lobules, also known as the milk-producing areas of the breast.
Breast cancer is the second leading cause of cancer death in women (after lung cancer). Although African-American women have a slightly lower incidence of breast cancer after age 40 than Caucasian women, they have a slightly higher incidence rate of breast cancer before age 40. However, African-American women are more likely to die from breast cancer at every age. Breast cancer is much less common in males; by comparison, the disease is about 100 times more common among women. According to the American Cancer Society, an estimated 1,910 new cases of invasive breast cancer are expected to be diagnosed among men in the United States in 2009.
Types of breast cancer
There are several different types of breast cancer that can be divided into two main categories - noninvasive cancers and invasive cancers. Noninvasive cancer may also be called "carcinoma in situ." Noninvasive breast cancers are confined to the ducts or lobules and they do not spread to surrounding tissues. The two types of noninvasive breast cancers are ductal carcinoma in situ (referred to as DCIS) and lobular carcinoma in situ (referred to as LCIS).
It is known that hormones in a woman's body, such as estrogen and progesterone, can play a role in the development of breast cancer. In breast cancer, estrogen causes a doubling of cancer cells every 36 hours. The growing tumor needs to increase its blood supply to provide food and oxygen. Progesterone seems to cause stromal cells (the woman's own cells to send out signals for more blood supply to feed the tumor.
TODAY'S HOT TIP! You can read more about breast cancer at the NBCAM website!
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