Breast Cancer Gene Test – Cancer Symptom

A relative with cancer has a diagnostic blood test to see if they have a cancer risk gene this must happen before any healthy relatives are tested. The brca gene test is a blood test that uses dna analysis to identify harmful changes mutations in either one of the two breast cancer susceptibility genes brca1 and brca2.

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Genetic testing for breast cancer who should be tested for brca.

Breast cancer gene test. But inherited changes in some other genes including palb2 chek2 atm pten linked with cowden syndrome and tp53 linked with li fraumeni syndrome can also increase breast cancer risk. People who inherit mutations in these genes are at an increased risk of developing breast cancer and ovarian cancer compared with the general population. Genetic testing for hereditary breast and ovarian cancer looks for mutations in the brca1 and brca2 genesyour doctor might suggest testing using a multigene panel which looks for mutations in several genes at the same time including brca1 and brca2if you are of ashkenazi jewish or eastern european ancestry your doctor might suggest testing for three specific brca1 and brca2 mutations.

Genetic tests can tell you if you have an inherited gene mutation for breast cancer. You can have a test that looks for an individual gene abnormality or a larger panel test that examines several. If your relatives test is positive you can have the predictive genetic test to see if you have the same faulty gene.

Their result will be ready 4 to 8 weeks later. If the test is positive there is still a 15 to 20 chance of not developing breast cancer. This process is sometimes called gene expression profiling.

While brca1 and brca2 gene mutations may increase your odds of developing breast cancer your odds of having either mutation are pretty small. A womans lifetime risk of developing breast andor ovarian cancer is greatly increased if she inherits a harmful mutation in brca1 or brca2. These tests are done on breast cancer cells after surgery or biopsy to look at the patterns of a number of different genes.

Genetic testing is costly ranging from about 400 to more than 3000 depending on the type of test. Testing for other gene mutations linked with breast cancer risk mutations in one of the brca genes account for most inherited breast cancers. The patterns found can help predict if certain early stage breast cancers are likely to come back after initial treatment.

An estimated 025 of the general population carries a mutated brca gene or about one out of every 400 people. Three of the most well known genes that can mutate and raise the risk of breast andor ovarian cancer are brca1 brca2 and palb2women who inherit a mutation or abnormal change in any of these genes from their mothers or their fathers have a much higher than average risk of developing breast cancer andor ovarian cancer. About 12 of women in the general population will develop breast cancer sometime during their lives by contrast a recent large study estimated that about 72 of women who inherit a harmful brca1 mutation and about 69 of women who.

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