A woman has a 1 in 8 chance of developing breast cancer over her lifetime. Women who have one or more first-degree relatives (mother/father, sister/brother, or daughter/son) diagnosed with breast cancer are at higher risk of developing cancer.
Women who are considered at a higher risk may need to begin mammography earlier, such as in these instances:
- Women with strong family history:
- First-degree relatives diagnosed with breast cancer especially at pre-menopausal ages (i.e., parent, sibling or child)
- Parent or family member with one of the breast cancer genes (BRCA 1 or BRCA 2)
- Women with a past history of receiving radiation to the chest between the age of 10 and 30 years.
The age of your relative(s) at diagnosis can guide decision-making regarding when you begin screening mammography. For example, if your mother was diagnosed in her 30s, your first mammogram would most likely be recommended earlier than age 40.
Known genetic predisposition is found in about 5-10% of breast cancers, with the BRCA1 or BRCA2 mutation being the most widely recognized. The lifetime risk for breast cancer is 50-85% among BRCA1 carriers and approximately 45% among BRCA2 carriers.
Women with strong family histories are at a higher risk. The number of family members with breast cancer, especially first-degree relatives, and their age at diagnosis are important considerations.
If your breast cancer risk is higher than average, talk to your doctor about a more aggressive breast cancer screening plan that is specific to your particular situation. Your plan may include breast MRI.