Researchers Find an 'Alarming' Rise in Breast Cancer Rates in Women Under 40, Especially in These 5 States

The increase cannot be explained by genetics, researchers say

Getty Stock image of a young woman getting a mammogram.

Getty

Stock image of a young woman getting a mammogram.

Breast cancer rates in women under the age of 40 are rising across the united states — and in some regions surging 32%.

Researchers from Columbia University’s Mailman School of Public Health looked at data from all 50 states and found that overall, breast cancer in women under 40 is on the rise — and it’s worse in the Northeast, which “had the highest absolute rate of BC among women under 40 and experienced a significant increase” between 2001 and 2020. Their findings were published on Wednesday, Feb. 12, in Cancer Causes & Control.

“Breast cancer incidence is increasing in U.S. women under 40, but until now, it was unknown if incidence trends varied by U.S. geographic region,” Rebecca Kehm, PhD, assistant professor of Epidemiology at Columbia Mailman School, and the study’s first author, said in a statement. “Our findings can more accurately inform whether exposures that vary in prevalence across the U.S. also contributes to breast cancer risk in younger women.”

Getty Stock image of a state sign for Connecticut.

Getty

Stock image of a state sign for Connecticut.

Related: Just Got a Breast Cancer Diagnosis? Here Are 5 Questions to Ask Your Doctor

The five states with the highest early-onset incidence from 2001 to 2020 were Maryland, New York, New Jersey, Hawaii and Connecticut. In those five states, breast cancer rates were 32 percent higher than those with the lowest incidence.

“The increase in incidence we are seeing is alarming and cannot be explained by genetic factors alone which evolve over much longer periods,” Kehm said, “nor by changes in screening practices given that women under 40 years are below the recommended age for routine mammography screening.”

Getty Stock image of a young woman talking to a doctor.

Getty

Stock image of a young woman talking to a doctor.

Related: What Olivia Munn's Doctor Wants You to Know About Your Breast Cancer Risk Assessment Score (Exclusive)

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Women getting screened for breast cancer at age 40 is a relatively new development; Last April, the  U.S. Preventive Services Task Force advised all women — regardless of family history — to begin getting mammograms at age 40.

Although most insurance plans cover routine mammograms, the CDCs National Breast and Cervical Cancer Early Detection Program (NBCCEDP) provides screenings and other services to women who are uninsured or fall below the federal poverty limit. (Click here to find a screening provider in your area.)

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