Breast cancer treatment during pregnancy: What you need to know

Breast cancer is one of the most common types of cancer in women around the world, affecting one in eight women at some point in their lives. It is a serious diagnosis that can cause a lot of anxiety, fear and uncertainty. But when you add pregnancy to the mix, the situation becomes more complicated. Breast cancer treatment during pregnancy requires careful consideration and planning to ensure the best possible outcome for both the mother and the baby.

Pregnancy is a time of intense physical and hormonal changes. The breasts undergo significant changes to prepare for lactation, making it more difficult to detect cancer. Moreover, some breast cancer treatments can harm the developing fetus. The type and stage of breast cancer, as well as the duration of pregnancy, all influence the decisions about treatment.

The first step in managing breast cancer during pregnancy is to establish a multidisciplinary team of specialists including a breast surgeon, a medical oncologist, a radiation oncologist, and a high-risk obstetrician. Together, they will assess the risks and benefits of various treatment options, taking into account the stage of cancer, the age of the woman, and the stage of pregnancy.

Surgery is usually the first line of treatment for breast cancer during pregnancy, as it doesn't harm the baby. Lumpectomy (removal of the tumor and surrounding tissue) or mastectomy (removal of the entire breast) may be performed, depending on the size and location of the tumor. Lumpectomy is usually followed by radiation therapy, which can safely be given after the first trimester. Mastectomy, on the other hand, eliminates the need for radiation therapy but requires reconstruction afterward.

Chemotherapy is also an option, but it carries a risk of harm to the fetus, especially during the first trimester when the baby's organs are developing. Chemotherapy may be postponed until after the first trimester if possible, or the dosage may be reduced to minimize the risk. In some cases, targeted therapy with drugs like trastuzumab (Herceptin) may also be used.

Hormonal therapy, which blocks estrogen receptors in the breast tissue, is not recommended during pregnancy, as it can harm the developing fetus. It may, however, be used after delivery if the woman is not breastfeeding.

Radiation therapy during pregnancy is a controversial issue, as it can harm the developing fetus and increase the risk of birth defects. It should be avoided during the first trimester when the baby's organs are forming. After that, the risks are lower, but it still requires careful consideration and planning.

Breastfeeding after breast cancer treatment is possible in some cases, depending on the type of treatment and the stage of cancer. Radiation therapy and chemotherapy can affect the breast tissue and reduce milk production. Hormonal therapy can also interfere with breastfeeding. A lactation consultant can help women find alternative feeding methods and optimize milk production.

In conclusion, breast cancer treatment during pregnancy requires careful consideration and coordination of care between various specialists. Surgery is usually the first line of treatment, followed by radiation therapy or chemotherapy, depending on the stage of cancer and the duration of pregnancy. Hormonal therapy is not recommended during pregnancy, but it can be used after delivery if the woman is not breastfeeding. Breastfeeding after breast cancer treatment is possible in some cases, but it requires careful planning and monitoring. If you are pregnant and have been diagnosed with breast cancer, seek the advice of a multidisciplinary team of specialists as soon as possible to ensure the best possible outcome for both you and your baby.

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