What Increases the Risk of Breast Cancer?

Understanding Breast Cancer Risk: Genetics, Hormones and Lifestyle

Breast cancer is one of the most common cancers among women worldwide, although men can develop it too. Understanding breast cancer risk factors can support informed screening and prevention decisions. While the causes of breast cancer are not yet fully understood, several risk factors are known to increase the chances of developing the disease.

What Are the Symptoms of Breast Cancer?   

Factors associated with a higher risk of breast cancer include: 

1. A change in the breast skin colour.
2. A change in the size or shape of one or both breasts.
3. Redness or rash in the breast or nipple area.
4. Persistent pain in the breast that lasts for a long time.
5. A new lump appears on the breast or underarm area.
6. Swelling in the breast, chest, or armpit.
7. Changes in the nipple shape or some discharge from the area.

Risk Factors of Breast Cancer

Here are the different risk factors leading to breast cancer:

1. Age and Sex

Females have a higher risk of breast cancer. Breast cancer occurs much more often in women, partly because of differences in breast tissue and lifetime hormone exposure. The risk of getting breast cancer also escalates with age. Older women are more likely to develop breast cancer, with the majority of cases occurring after the age of 50.

2. Family and Genetic History

Inherited mutations of the BRCA1 and BRCA2 genes can increase breast cancer risk. Women carrying these mutations have up to a 70% risk of developing breast cancer by age 80. Additionally, having a family history of breast cancer, particularly in a first-degree relative like a mother, sister, or daughter, also raises one's risk. Doctors recommend increased screening and preventive actions for people with gene mutations that increase the risk of breast cancer.

3. Hormonal Factors

Hormonal exposure is central to breast cancer risk. Women who begin menstruating before age 12 or become menopausal at 55 years or later have an increased period of oestrogen exposure, elevating their risk. Furthermore, those who never give birth or give their first birth at 30 years of age or older may also be at increased risk, perhaps as a result of uninterrupted oestrogen cycles.

4. Hormone Replacement Therapy (HRT)

Hormone replacement therapy, especially combined estrogen and progestin therapy, elevates breast cancer risk. Moreover, women with HRT use over long durations may be at increased risk, although the risk seems to wane after cessation of therapy.

5. Lifestyle and Environmental Factors

Many lifestyle elements can lead to a higher risk of breast cancer. These include:

• Alcohol Use: Research indicates a definite association between alcohol consumption and the risk of breast cancer. Even moderate alcohol use (one alcoholic beverage per day) can raise risk, and the risk increases with the quantity consumed.
• Obesity and Physical Inactivity: Being obese or overweight, particularly after menopause, increases the risk of breast cancer. Fat tissue produces estrogen, and higher body fat levels correlate with increased hormone levels. Physical inactivity may also be a cause of this hormonal imbalance.
• Diet: No food has been directly associated with breast cancer, but a diet high in saturated fats and processed foods can lead to an indirect increase in risk, causing obesity.
• Smoking: Tobacco use, particularly when initiated early in life, is associated with numerous cancers, including breast cancer. Smoking is associated with a higher risk of breast cancer; avoid claims about tumour aggressiveness without supporting evidence.

6. Radiation Exposure

Women treated with radiation to the chest, particularly during adolescence or young adulthood (such as for Hodgkin's lymphoma), are much more likely to get breast cancer later in life. Risk is also based on the dose of radiation and age at exposure.

7. Breast Density

Women with dense breast tissue are more at risk of breast cancer. Moreover, dense tissue can also make tumours harder to find during a mammogram, which means there can be a delay in diagnosis. 

8. Certain Medical Conditions and Medications

Diseases like atypical hyperplasia or lobular carcinoma in situ (LCIS), diagnosed by biopsy, signify abnormal growth of breast cells, which raises the risk of invasive breast cancer. Also, long-term use of some medications, such as oral contraceptives, can raise breast cancer risk slightly, although study findings are inconsistent.

Breast cancer risk is influenced by both non-modifiable factors, such as age and family history, and modifiable factors, such as alcohol consumption and physical activity. 

Understanding these risk factors enables an individual to take preventive measures and get an early diagnosis. Therefore, routine screening, genetic counselling (if appropriate), and a healthy lifestyle are still the main elements in decreasing the overall burden of breast cancer.

Also Read:

→ What Increases the Risk of Lung Cancer

→ Survival Rate for 3rd-Stage Breast Cancer

→ Survival Rate for Stage 3 Cancer

→ What Level of CA 19-9 Indicates Cancer