What are the top risk factors for breast cancer one needs to know?

Breast cancer is a serious health issue for women and understanding the risk factors can help a person in early detection and prevention. In a study conducted in 2023, among 12,808 patients with malignant breast cancer, 17.09% of patients were <=40 years, with the youngest patient being 21 years. Further, among this younger age group, 30% of tumors were Triple-negative tumors, which are known as the most aggressive form of tumor, as it is a fast-growing quick-to-spread tumor. As per various global studies, Triple-negative breast tumors are common among certain ethnicities as well as patients with genetic mutations in the BRCA1 gene. Thus, with the age of onset slowly declining among Indians, it is important to be aware of the predisposing risk factors that may contribute to breast cancer.

Some of the key risk factors every woman should know are as follows:
1. Gender: Women are at a higher risk of developing breast cancer than men.
2. Age: As people age, the risk rises, especially beyond the age of 50. The age of onset, however, may be lowered, particularly in patients who have a positive family history of ovarian and breast cancer.
3. Family history: An increased risk may result from a family history of breast cancer, particularly in first-degree relatives (mother, sister, or daughter).
4. Genetic mutations: Certain inherited genetic mutations, such as BRCA1 and BRCA2, will increase the risk of breast cancer.
5. Personal history: A personal history of breast cancer or certain non-cancerous breast diseases can increase the risk.
6. Hormonal factors: Early menstruation (before age 12), late menopause (after age 55), and prolonged exposure to estrogen (such as hormone replacement therapy) can increase the risk.
7. Reproductive history: Women who have never had children or who had their first child after age 30 may have a higher risk.
8. Radiation exposure: Previous radiation therapy to the chest area, especially during adolescence, can increase the risk.
9. Lifestyle factors
Alcohol consumption: Higher alcohol consumption results in increased risk.
Obesity: Being overweight or obese, particularly after menopause, can increase the risk.
Physical inactivity: Lack of regular physical activity will result in a higher risk of breast cancer.
Diet: A diet high in saturated fats and low in fruits and vegetables may contribute to the risk.
10. Ethnicity: Certain ethnic groups may have varying levels of risk; for example, Caucasian women have a higher incidence than African American women, but African American women are more likely to die from the disease.
11. Menstrual cycle factors: Women who experience irregular menstrual cycles or have conditions like polycystic ovary syndrome (PCOS) may have an increased risk.
12. Smoking: There is evidence suggesting that smoking may increase the risk of breast cancer, particularly in premenopausal women.

Prevention and early detection

• Regular screening: Mammograms and clinical breast exams can help detect breast cancer early.
• Healthy lifestyle choices: Maintaining a healthy weight, exercising regularly, limiting alcohol intake, and eating a balanced diet can help reduce risk.
• Genetic testing: Women with a family history of breast cancer may consider genetic testing to assess their risk for inherited mutations like BRCA1 and BRCA2. This information can guide decisions about preventive measures, such as increased surveillance or prophylactic surgeries.
• Hormonal treatments: Women who have undergone hormone replacement therapy (HRT) for extended periods may have an increased risk of breast cancer. Discussing the risks and benefits of HRT with a healthcare provider is essential.
• Environmental factors: Exposure to certain environmental pollutants and chemicals may also play a role in breast cancer risk. Awareness of these factors can help in making informed lifestyle choices.

Understanding these risk factors is important for every woman. While some factors, like age and genetics, cannot be changed, many lifestyle choices can be modified to help reduce overall risk. Regular check-ups and open discussions with healthcare providers about personal risk factors and screening options are vital for early detection and prevention.

(Author: Dr. Vani Ravikumar, Senior Consultant and Head of Histopathology, Metropolis Healthcare)