Pregnancy-Associated Breast Cancer (PABC) refers to breast cancer diagnosed during pregnancy or within the first year after delivery. Although rare, occurring in approximately 1 in 3,000 pregnancies, its incidence is increasing as more women delay childbearing. Diagnosing and treating PABC can be challenging because normal pregnancy-related changes in the breast may mask symptoms, but early detection is crucial to protect both mother and baby.

Causes and Risk Factors

While the exact cause of PABC remains unknown, several factors contribute to its development:

• Hormonal influence: High levels of estrogen and progesterone during pregnancy may stimulate the growth of hormone-sensitive cancer cells.

• Maternal age: Breast cancer risk naturally increases with age, and pregnancies at later ages increase the chances of PABC.

• Genetic predisposition: Women with a family history of breast cancer or BRCA1/BRCA2 mutations are at higher risk.

• Breast tissue density: Pregnancy increases breast density, making it more difficult to detect abnormal lumps.

Symptoms

PABC symptoms are similar to those of breast cancer in non-pregnant women but may be harder to identify during pregnancy. Warning signs include:

• A persistent lump in the breast that does not resolve.

• Skin changes such as redness, dimpling, or puckering.

• Nipple changes, including inversion or unusual discharge.

• Breast swelling or asymmetry.

• Localized pain or discomfort (though breast cancer is often painless).

Any breast change during pregnancy or postpartum should be promptly evaluated by a specialist.

Diagnosis

Safe and accurate diagnosis is essential:

• Ultrasound is the preferred imaging method during pregnancy as it does not use radiation.

• Mammography may be performed if needed, with abdominal shielding to protect the fetus.

• Biopsy is always required to confirm cancer and determine the best treatment plan.

Treatment Options

Treatment is carefully tailored to protect the mother’s health while minimizing risks to the baby. Management depends on the stage of cancer, gestational age, and overall health.

• Surgery: Both lumpectomy and mastectomy can be performed safely during pregnancy. Sentinel lymph node biopsy may also be done if necessary.

• Chemotherapy: Certain chemotherapy drugs are considered safe in the second and third trimesters. They are generally avoided in the first trimester due to risk of birth defects.

• Radiation therapy: Usually postponed until after delivery because of the potential harm to the fetus.

• Hormonal therapy and targeted therapy: Typically delayed until after childbirth.

Why Early Consultation Matters

Many women mistake PABC symptoms for normal pregnancy-related breast changes. However, timely consultation with a breast specialist ensures early diagnosis and treatment, significantly improving outcomes for both mother and child.

Expert Care with Dr. Ritika Bhandari

Dr. Ritika Bhandari provides compassionate and evidence-based care for women diagnosed with Pregnancy-Associated Breast Cancer. She works closely with obstetricians and oncologists to ensure a safe, multidisciplinary approach that prioritizes both maternal and fetal well-being.