Gene associated with breast cancer

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Genes are short segments of DNA deoxyribonucleic acid found in chromosomes. DNA contains the instructions for building proteins. And proteins control the structure and function of all the cells that make up your body. Think of your genes as an instruction manual for cell growth and function.
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Breast cancer

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Researchers Identify Genes Associated With Breast Cancer

Hundreds of different types of mutations in these genes have been identified, some of which have been determined to be harmful, while others have no proven impact. Harmful mutations in these genes may produce a hereditary breast-ovarian cancer syndrome in affected persons. Having a high-risk mutation does not guarantee that the woman will develop any type of cancer, or imply that any cancer that appears was actually caused by the mutation, rather than some other factor. High-risk mutations, which disable an important error-free DNA repair process homology directed repair , significantly increase the person's risk of developing breast cancer , ovarian cancer and certain other cancers.
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The Genetics of Cancer

Below are a number of other genes that are known to influence breast cancer risk. In each case, having a normal and healthy copy of the gene decreases the risk of developing breast cancer. The risk only increases if the gene is mutated or abnormal, and therefore does not perform its natural cancer-prevention functions.
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You may also find it helpful to learn about all known breast cancer risk factors and ovarian cancer risk factors in addition to those that are genetic. About 5 to 10 percent of people diagnosed with breast cancer have inherited an increased risk of developing the disease. In these cases, breast cancer runs in the family. Similarly, 5 to 10 percent of ovarian cancers diagnosed are hereditary.
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