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Breast Cancer
Breast Cancer is a cancer that starts in the tissues of the breast. There are two types of breast cancer
  1- Ductal carcinoma starts in the tubes that move milk from the breast to the nipple. Most breast cancer is of this type.
  2- Lobular carcinoma starts in the parts of the breast, called lobules. That produce milk
In rare cases breast cancer can starts of the breast.
Breast cancer may be invasive. Invasive means it has spread from the milk duct or lobule to other tissues in the breast. Noninvasive means it has not yet invaded other breast tissue .noninvasive breast cancer is called (in situ)
  1- Ductal carcinoma in situ (DCIS), or intraductal carcinoma, is breast cancer in the lining of the milk ducts that not yet invaded nearby tissues. It may progress to invasive cancer if untreated.
  2- Lobular carcinoma in situ (LCIS) is a maker for an increased risk of invasive cancer in the same or both breasts.
Many breast cancers are sensitive to the hormone estrogen. This means that estrogen cause the cancer tumor to grow. Such cancers have estrogens receptors on the surface of their cells. They called estrogen receptor-positive cancer or ER-positive cancer.

Causes, Incidents, and risk factors

Over the course of lifetime, 1 of 8 women will be diagnosed with breast cancer

Risk factors you cannot change include
  1 Age and gender: Your risk of developing breast cancer increases as you get older
  2 Family history of breast cancer: You may also have a higher risk for breast cancer if you have a close relative who has had breast cancer.
  3     Genes: Some people have genes that make more likely t develop breast cancer. The most common gene defects are founds in the BRCA! And BRCA2 genes.
  4 Menstrual Cycle: Women who got their periods early before 12 years old.
  5 Alcohol Abuse: Drinking more than 1-2 glasses of alcohol a day may increase your risk for breast cancer
  6 Hormone Replacement Therapy : You have a higher risk...