Anyone can get breast cancer. While it is far more common in women, it also occurs in men, transgender individuals, and people of every age and racial background. Your risk level depends on a combination of factors including genetics, hormones, body composition, and lifestyle, but no group is completely immune.
Men Get Breast Cancer Too
About 1 out of every 100 breast cancers diagnosed in the United States is found in a man. Men have a small amount of breast tissue, and cancer can develop in that tissue just as it does in women. Male breast cancer is most common after age 60, and men with a family history of breast cancer or who carry certain gene mutations face higher risk. Because most men don’t expect it, male breast cancer is often caught at a later stage.
How Age Changes Your Risk
Breast cancer risk rises steadily with age. A woman’s chance of developing breast cancer by age 30 is about 1 in 1,500. By 40, that jumps to 1 in 173. By 50, it’s 1 in 45. By 70, it reaches roughly 1 in 12. The sharpest increases happen between a woman’s 40s and 60s, which is why mammogram screening is now recommended starting at age 40 with scans every two years through age 74.
That said, breast cancer before 40 does happen. Younger women tend to be diagnosed with more aggressive forms, partly because screening isn’t routine at that age and tumors may grow undetected for longer. If you have a strong family history or a known genetic mutation, your doctor may recommend earlier and more frequent screening.
Race and Ethnicity Matter
Breast cancer does not affect all racial and ethnic groups equally, and the disparities go beyond simple incidence numbers. White and Black women develop breast cancer at nearly the same rate overall, but the pattern shifts depending on age. Black women are more likely to be diagnosed before age 45, while White women have higher rates between ages 60 and 84. Hispanic, Asian/Pacific Islander, and American Indian/Alaska Native women have lower overall incidence rates.
The most alarming disparity is in survival. Black women are more likely to die from breast cancer at every age. The five-year survival rate for Black women is 81%, compared to 92% for White women. Black women also tend to be diagnosed younger, at a median age of 59 versus 63 for White women, and are more likely to be diagnosed at an advanced stage. Chinese and Japanese women have the highest breast cancer survival rates of any racial or ethnic group.
These gaps reflect a mix of biology, access to care, and systemic inequities. Black women are more frequently diagnosed with triple-negative breast cancer, a subtype that is harder to treat. Delays in diagnosis, differences in treatment quality, and barriers to follow-up care also play a role.
Genetic Mutations and Family History
Inherited gene mutations are among the strongest known risk factors. Women who carry a BRCA1 mutation have a 72% cumulative risk of developing breast cancer by age 80. For BRCA2 carriers, the risk is 69%. These numbers are dramatically higher than the general population’s lifetime risk of about 13%.
BRCA mutations also increase risk in men. A man with a BRCA2 mutation has a significantly higher chance of breast cancer than a man without one. Beyond BRCA1 and BRCA2, several other gene variants raise risk to a lesser degree, and having a first-degree relative (parent, sibling, or child) with breast cancer roughly doubles your risk even without a known mutation. If multiple family members on either side have had breast or ovarian cancer, genetic counseling can help clarify whether testing makes sense for you.
Hormones, Periods, and Menopause
The longer your body is exposed to estrogen, the higher your breast cancer risk. This is why two reproductive milestones matter: when your periods started and when they stop. Starting menstruation before age 12 or reaching menopause after age 55 both extend that window of estrogen exposure. Women who go through menopause later in life have a higher risk of breast cancer than those who experience it earlier.
Conversely, premature menopause (before age 40) or early menopause (before 45) is associated with lower breast cancer risk because the ovaries stop producing estrogen sooner. Women who have never been pregnant or who had their first full-term pregnancy after age 30 also face modestly higher risk, since pregnancy temporarily changes how breast cells grow and respond to hormones.
Body Weight and Physical Activity
The relationship between weight and breast cancer depends on where you are in life. Before menopause, higher body weight is actually associated with slightly lower breast cancer risk. After menopause, the relationship flips: obesity becomes a clear risk factor. The reason is that after the ovaries stop producing estrogen, fat tissue becomes the body’s main source of it. More fat tissue means more estrogen circulating in the body, which fuels the growth of hormone-sensitive breast cancers.
Regular physical activity lowers risk at any age. Even moderate exercise, like brisk walking for 30 minutes most days, appears to provide a meaningful protective effect. The benefit comes partly from helping maintain a healthy weight and partly from independent effects on hormone levels and inflammation.
Alcohol Raises Risk More Than Most People Realize
Alcohol is one of the most well-established modifiable risk factors for breast cancer, and the threshold is lower than many people assume. Each additional 10 grams of alcohol per day (roughly one standard drink) increases breast cancer risk by about 7%. Women who drink three or more drinks daily raise their risk by 30 to 40% compared to non-drinkers. For postmenopausal women, even less than one drink a day has been linked to up to a 30% increase in breast cancer mortality.
Alcohol raises estrogen levels and can damage DNA in breast cells. Adequate folate intake may blunt some of this risk, but it doesn’t eliminate it. If you’re weighing your habits against your risk profile, alcohol is one of the few factors entirely within your control.
Breast Density as a Risk Factor
Dense breast tissue is both a risk factor for breast cancer and a barrier to detecting it. Breast density refers to the ratio of fibrous and glandular tissue to fatty tissue on a mammogram. About half of women have dense or extremely dense breasts, and these women face a higher risk of developing breast cancer than women with mostly fatty breast tissue.
Dense tissue also makes tumors harder to spot on standard mammograms because both dense tissue and tumors appear white on the image. Many states now require that mammogram results include information about your breast density, so you can discuss supplemental screening options like ultrasound or MRI if your density is high.
Transgender Individuals and Breast Cancer
Transgender women (assigned male at birth, taking feminizing hormones) can develop breast cancer. Estrogen therapy promotes breast tissue growth, and with that tissue comes risk. Current guidelines recommend that transgender women begin screening mammography at age 50, but only after a minimum of 5 to 10 years of feminizing hormone use. Once those criteria are met, screening every two years is the standard approach.
Transgender men (assigned female at birth) who have not had mastectomy still have breast tissue and remain at risk. Even after top surgery, small amounts of breast tissue may remain, so awareness of changes in the chest area is still important. Risk factors like family history and genetic mutations apply regardless of gender identity.