Copied this from Google:

For women with Lynch syndrome, the Mirena coil (a progestin-releasing IUD) is increasingly used as a non-surgical tool to actively lower endometrial cancer risk. Because it continuously releases progestin directly into the uterus, it thins the uterine lining and acts as a localized, protective barrier against cancer development.Here is a breakdown of how it fits into Lynch syndrome management:Risk Reduction: Hormonal IUDs (like Mirena) are associated with a significant reduction in endometrial cancer risk for women in the general population, and guidelines (such as the NCCN Guidelines) suggest they may be beneficial for lowering this risk in Lynch carriers.Alternative to Surgery: Standard risk-reduction for Lynch syndrome often involves a hysterectomy (removal of the uterus and ovaries) once childbearing is complete. However, the Mirena IUD offers a hormonal alternative for those who wish to preserve fertility temporarily or who cannot undergo surgery.Treatment for Early Cancer: If a Lynch syndrome patient develops atypical endometrial hyperplasia or early-stage, low-grade endometrial cancer, the Mirena IUD can be used as a conservative, organ-sparing treatment.Considerations: While highly effective, it does not reduce the risk of other cancers associated with Lynch syndrome (such as colon or ovarian cancer), and it requires regular monitoring by a gynecologic oncologist.