Can Sisters Have Different Brca Results?
All Blood Relatives of a Person Who Has Inherited a Harmful Brca1 or Brca2 Variant Are at Some Increased Risk of Having the Variant Themselves. for Example...
All blood relatives of a person who has inherited a harmful BRCA1 or BRCA2 variant are at some increased risk of having the variant themselves. For example, each of that person's full siblings has a 50% chance of having inherited the variant as well.
Are you more likely to get breast cancer if your sister has it?
Women with close relatives who've been diagnosed with breast cancer have a higher risk of developing the disease. If you've had one first-degree female relative (sister, mother, daughter) diagnosed with breast cancer, your risk is doubled.
Can BRCA tests be wrong?
The results of a BRCA test are usually simple. They will show any mutation in BRCA1 or BRCA2 genes. As with all genetic tests, there is the chance of a false positive or an unclear result.
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