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Cancer Risk Varies by Gene in Women With Lynch Syndrome

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Gene-specific cancer risks in female Lynch syndrome carriers A copula-based meta-analysis.DOI 10.1016j.maturitas.2026.108829

Lynch syndrome is an inherited condition that increases the risk of several cancers. Women with this genetic condition are especially at risk for endometrial (uterine) cancer and ovarian cancer, and possibly breast cancer. Lynch syndrome happens because of changes in genes that normally repair damaged DNA.
Researchers recently analyzed many studies to better understand how cancer risk differs depending on the specific Lynch syndrome gene involved. The study looked at three major cancers affecting women: endometrial, ovarian, and breast cancer.
The results showed that about 20% of women with Lynch syndrome develop endometrial cancer, making it the most common cancer linked to the condition. Around 5–6% develop ovarian cancer, while about 11% develop breast cancer.
The study also found that cancer risk can vary depending on which gene is affected. Women with mutations in the MSH6 gene had a higher risk of endometrial cancer compared with other Lynch syndrome genes. In contrast, women with PMS2 mutations had a lower risk of endometrial cancer.
When it came to breast cancer, the results suggested that women with MSH6 or PMS2 gene changes may have a higher risk, though researchers say more studies are needed before confirming breast cancer as part of the Lynch syndrome spectrum.
These findings highlight the importance of personalized cancer screening for women with Lynch syndrome. Doctors may adjust surveillance plans depending on the specific gene mutation a patient carries.
Better understanding gene-specific cancer risks can help women and their doctors make informed decisions about screening, prevention, and long-term health care.


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dr swati shah - uro & gynec cancer surgeon
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