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Personalized Medicine for the 21st Century
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Susan's Story
A Personal and Family History of Breast Cancer
Susan was 32 when she felt a small, new lump in her
right breast on self exam. Her primary care
physician recommended a biopsy and the results
showed that the lump was indeed breast
cancer. Fortunately, the cancer had not spread to
lymph nodes or other organs by the time it was
diagnosed and Susan had many treatment options
available to her.
Because she was only 32 - much younger than the
average woman diagnosed with breast cancer - Susan was
referred for genetic counseling. Susan knew that her
father's sister and his mother both had breast
cancer before age 50. However, she had always
thought this family history was irrelevant to her
risk for breast cancer because it was on her
father's side.
Susan learned that her family history of cancer was
indeed significant and that she was a good candidate for
genetic testing for BRCA1 and BRCA2, two of the known
inherited breast cancer susceptibility genes. She
pursued testing and her results showed that she had
inherited an alteration, or 'mutation' in the BRCA2
gene. This mutation explained why she had developed
breast cancer at 32, and also informed her about her
significantly increased risk for a second breast cancer
(either in the same breast or the other breast) and for
ovarian cancer. Susan felt lucky to have this information;
she was able to discuss her options for managing these
risks with her doctor and the genetics team and make
decisions that were right for her. Susan's genetic test
result also provided valuable information for her
relatives: through a very accurate test for the specific
mutation identified in Susan, her relatives learned whether
or not they had inherited the significantly increased
risk for cancer present in some members of the family.
Those who had not inherited the risk were given great
reassurance, while those who had inherited it were able
to be proactive in managing their risks.
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