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Treatment of Early/Localized/Operable Breast Cancer During Pregnancy
Source: Breast Cancer Treatment During Pregnancy (PDQ®)–Health Professional Version, National Cancer Institute.
Source updated: December 4, 2024 · Captured 2026-09-09.
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Generally, pregnant women with stage I or stage II breast cancer are treated in the same way as nonpregnant patients, with some modifications to protect the fetus.
Treatment options for early/localized/operable breast cancer in pregnant women include:
Surgery. Postpartum radiation therapy may also be given to women diagnosed with breast cancer late in pregnancy.
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Chemotherapy (after the first trimester).
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Endocrine therapy (after delivery).
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The use of trastuzumab during pregnancy is contraindicated.
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Preserved source evidence · Not medical advice