Mammograms After Breast Cancer Surgery

There are many different kinds of breast cancer surgery. The type of surgery you have had will determine whether you need to get mammograms in the future. If you have had breast-conserving surgery (BCS), you need to continue to get mammograms. If you have had a mastectomy, you most likely won't need a mammogram of that breast.

However, if you had surgery (of any type) on only one breast, you will still need to get mammograms of the unaffected breast. This is very important, because women who have had one breast cancer are at higher risk of developing a new cancer in the other breast.

While the American Cancer Society does not have specific guidelines for mammograms or other breast imaging in women who have been treated for breast cancer, there is information available about what these women will probably need to do.

Mammograms after breast-conserving surgery

Most experts recommend that women who have had breast-conserving surgery or BCS (sometimes called a partial mastectomy or lumpectomy) get a mammogram of the treated breast 6 to 12 months after radiation treatment ends. Surgery and radiation both cause changes in the skin and breast tissues that will show up on the mammogram, which might make it harder to read. The mammogram done at this time serves as a new baseline for the affected breast. Future mammograms will be compared with this one, to help the doctor check on healing and look for signs that the cancer has come back (recurred).

You should have follow-up mammograms of the treated breast at least yearly after that, but some doctors may recommend that you have mammograms more often. You will still need to have routine mammograms on the opposite (untreated) breast as well.

Mammograms after mastectomy

Women who have had a mastectomy (including simple mastectomy, modified radical mastectomy, and radical mastectomy) to treat breast cancer should not need further routine screening mammograms on that side, but will still need to have a yearly mammogram on the remaining breast. If both breasts are removed (a double or bilateral mastectomy), additional mammograms should not be needed because there shouldn't be enough tissue left to do a mammogram. Cancer might come back in the skin or chest wall on that side, but it is usually found on a physical exam.

It’s possible for women with reconstructed breasts to get mammograms, but experts agree that women who have breast reconstruction after a simple, modified radical, or radical mastectomy don’t need routine mammograms. Still, if an area of concern is found during a physical exam on a woman who has had breast reconstruction, a diagnostic mammogram may be done. Breast ultrasound or MRI may also be used to look at the area closely.

Women who have had a subcutaneous mastectomy, also called skin-sparing mastectomy, still need follow-up mammograms. In this surgery, the woman keeps her nipple and the tissue just under the skin. Often, a breast implant is put under the skin. This surgery leaves behind enough breast tissue to require yearly screening mammograms in these women.

If you're not sure what type of mastectomy you had or if you need to get mammograms, be sure to ask your doctor.

The American Cancer Society medical and editorial content team

Our team is made up of doctors and oncology certified nurses with deep knowledge of cancer care as well as journalists, editors, and translators with extensive experience in medical writing.

National Comprehensive Cancer Network. NCCN Clinical Practice Guidelines in Oncology. Breast Cancer. Version 2.2019. Accessed at on August 21, 2019.

Venkataraman S, Slanetz PJ. Breast imaging for cancer screening: Mammography and ultrasonography. UpToDate. 2019. Accessed at on August 21, 2019.

Last Medical Review: October 3, 2019 Last Revised: October 3, 2019

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