Does a Breast Cancer Patient Need to Get Their Mirena Removed?
Yes, a breast cancer patient should have their Mirena (levonorgestrel-releasing IUD) removed promptly upon diagnosis of breast cancer. Current breast cancer is classified as Category 4 (unacceptable health risk) for levonorgestrel IUD use according to US Medical Eligibility Criteria 1, 2, 1, 2.
Immediate Management at Diagnosis
When breast cancer is diagnosed in a woman with a Mirena IUD:
- Remove the device promptly - this is the standard recommendation for current breast cancer 2
- The concern is that breast cancer is a hormonally sensitive tumor, and the levonorgestrel IUD releases progestin systemically (though primarily acts locally)
- If the patient desires continued contraception, offer a copper IUD as an alternative, which is Category 1 (no restriction) for current breast cancer 1
Alternative Contraceptive Options
For breast cancer patients needing contraception:
Recommended (Category 1 - No restrictions):
- Copper IUD (ParaGard) - safe and highly effective 1
- Barrier methods (condoms, diaphragm)
- Sterilization if desired
Contraindicated (Category 4 - Unacceptable risk):
- Levonorgestrel IUD (Mirena, Liletta, Skyla) 1, 2
- Etonogestrel implant (Nexplanon) 1
- Combined hormonal contraceptives (pills, patch, ring)
Special Consideration: Past Breast Cancer
For women with past breast cancer and no evidence of disease for 5 years, the levonorgestrel IUD is Category 3 (risks usually outweigh benefits) 2. This means:
- Generally avoid this method even after 5 years cancer-free
- If considered, requires multidisciplinary discussion and informed consent 3
- Copper IUD remains Category 1 and is the preferred IUD option 1
Important Caveats
Emerging evidence on breast cancer risk: Recent research suggests levonorgestrel IUD use may be associated with increased breast cancer risk, particularly in the first few years of use 4. While this doesn't change current guidelines for women already diagnosed with breast cancer, it reinforces the importance of removal at diagnosis.
Emergency contraception consideration: If the IUD is removed and there's concern about residual sperm from recent intercourse, emergency contraception should be offered 5. However, levonorgestrel emergency contraception should be avoided in breast cancer patients; copper IUD placement can serve as emergency contraception if needed 6, 7.
No delay in removal: Unlike some conditions where continuation may be acceptable while awaiting treatment, current breast cancer requires prompt IUD removal - the device should not remain in place 2.