What Is Breast Cancer?

Where breast cancer starts

Breast cancers can start from different parts of the breast.

  • Most breast cancers begin in the ducts that carry milk to the nipple (ductal cancers)
  • Some start in the glands that make breast milk (lobular cancers)
  • There are also other types of breast cancer that are less common like phyllodes tumor and angiosarcoma
  • A small number of cancers start in other tissues in the breast. These cancers are called sarcomas and lymphomas and are not really thought of as breast cancers.

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