Mammary cancers and pregnancy

Area of Science:

• Oncology
• Reproductive Medicine
• Maternal Health

Background:

• Management and prognosis of breast cancer during pregnancy, postpartum, and lactation remain uncertain.
• Pathological features and survival rates of breast cancer in pregnant women are comparable to non-pregnant individuals.

Purpose of the Study:

• To clarify the management and prognosis of breast cancer occurring during pregnancy, postpartum, and lactation.
• To provide evidence-based recommendations for treating breast cancer in these specific patient populations.

Main Methods:

• Review of existing literature and clinical guidelines.
• Analysis of pathological features and survival data in pregnant and lactating patients.
• Comparison of treatment outcomes between pregnant/lactating and non-pregnant patients.

Main Results:

• Breast cancer during pregnancy shares pathological features and survival rates with non-pregnant patients.
• Pregnancy termination does not improve survival; mastectomy is safe for the fetus, but chemotherapy/radiation should be avoided.
• Lactating women with breast cancer have unaffected survival; initial lactation suppression followed by mastectomy is recommended.

Conclusions:

• Management of breast cancer during pregnancy and lactation should mirror standard protocols for non-pregnant patients.
• Treatment decisions should balance efficacy with fetal safety, avoiding chemotherapy and irradiation during pregnancy.
• Subsequent pregnancies are permissible after breast cancer treatment; routine ovarian radiation is not recommended for premenopausal women.