What is breast cancer caused by

Breast cancer is the most common invasive cancer in women and the second leading cause of cancer death in women after lung cancer. The precise causes of breast cancer are unclear, but we know the main risk factors. HERbreast cancers are likely to benefit from chemotherapy and treatment targeted to HER2.

Breast cancer is an invasive tumor that develops in the mammary gland. Still, most women considered at high risk for breast cancer do not get it, while many with no known risk factors do. Breast cancer is a disease in which cells in the breast grow out of control.

Doctors seldom know why one woman develops breast cancer and another doesnt, and most women who have breast cancer will never be able to pinpoint an exact cause.

Warning Signs of

If your mother, sister or daughter was diagnosed with breast cancer, particularly at a young age, your risk of breast cancer is increased. The kind of breast cancer depends on which cells in the breast turn into cancer. The breast cancers stage refers to how far the cancer cells have spread beyond the original tumor (see the Stages of breast cancer below for more information).

Breast cancer is detected via mammograms, breast self-examination (BSE biopsy, and specialized testing on breast cancer tissue.

Causes of

A breast is made up of three main parts: lobules, ducts, and connective tissue. This type, which is also called triple-negative breast cancer, includes tumors that are ER negative, PR negative and HERnegative. Causes of But no one knows the exact causes of breast cancer. Most DNA mutations related to breast cancer take place in breast cells during a woman s life rather than having been inherited. How Does These genes might also cause much of the risk of breast cancer that runs in families.

Warning Signs of Although breast cancer generally shows no symptoms in the early stage, timely detection can turn a story of breast cancer into a survivors tale. Treatment of breast cancer may involve surgery, radiation, hormone therapy, chemotherapy, and targeted therapy). Breast cancer is always caused by a genetic abnormality (a mistake in the genetic material). If you ve had breast cancer in one breast, you have an increased risk of developing cancer in the other breast. Breast cancer can begin in different parts of the breast.

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