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Genetics
    

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Information about gene mutations and chromosomal abnormalities in this condition.

Most cases of breast cancer, about 90%, result from one or more mutations, mistakes made while the cells are dividing in the breast tissue. Another 10% of breast cancer is associated with specific inherited mutations.

There are several genes linked to an increased risk of breast cancer. Some of the most common hereditary cancer syndromes associated with breast cancer risk are described below.