Breast Cellular Changes

Breast cellular changes may be associated with an increased risk of breast cancer. These are found when a breast biopsy (tissue sample) is taken and the breast cells are examined under a microscope. Two cellular changes associated with breast cancer risk are:

• atypical ductal hyperplasia—an overactive growth of cells lining the breast ducts
• lobular carcinoma in situ—an uncontrolled growth of lobular cells, the cells that make breast milk

Lobular Carcinoma in Situ

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