AI Article Synopsis
- Family cancer history plays a significant role in assessing the likelihood of carrying pathogenic variants (PVs) in breast cancer patients, but its influence on specific genes is unclear.
- Researchers analyzed data from over 34,000 women diagnosed with breast cancer in California and Georgia, linking family history with genetic testing results to determine variations in PV prevalence.
- The findings revealed that while higher family history correlated with increased PV prevalence for certain genes and breast cancer subtypes, the overall extent of family history did not significantly affect PV association across established susceptibility genes, indicating it cannot reliably inform genetic testing choices.
Article Abstract
Purpose: Family cancer history is an important component of genetic testing guidelines that estimate which patients with breast cancer are most likely to carry a germline pathogenic variant (PV). However, we do not know whether more extensive family history is differentially associated with PVs in specific genes.
Methods: All women diagnosed with breast cancer in 2013-2017 and reported to statewide SEER registries of Georgia and California were linked to clinical genetic testing results and family history from two laboratories. Family history was defined as strong (suggestive of PVs in high-penetrance genes such as or , including male breast, ovarian, pancreatic, sarcoma, or multiple female breast cancers), moderate (any other cancer history), or none. Among established breast cancer susceptibility genes (, , , , , , , , , , and ), we evaluated PV prevalence according to family history extent and breast cancer subtype. We used a multivariable model to test for interaction between affected gene and family history extent for , , and .
Results: A total of 34,865 women linked to genetic results. Higher PV prevalence with increasing family history extent ( < .001) was observed only with (3.04% with none, 3.22% with moderate, and 4.06% with strong history) and in triple-negative breast cancer with (0.75% with none, 2.23% with moderate, and 2.63% with strong history). In a multivariable model adjusted for age and subtype, there was no interaction between family history extent and PV prevalence for any gene except ( = .037).
Conclusion: Extent of family cancer history is not differentially associated with PVs across established breast cancer susceptibility genes and cannot be used to personalize genes selected for testing.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8710333 | PMC |
| http://dx.doi.org/10.1200/PO.21.00261 | DOI Listing |
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