Women residing near federally designated Superfund sites face a significantly higher risk of developing aggressive breast cancers, including the difficult-to-treat triple-negative subtype, according to new research from the Sylvester Comprehensive Cancer Center at the University of Miami Miller School of Medicine.
The findings expand on previous work by the National Institutes of Health, which noted a troubling rise in hard-to-treat breast cancers. Now, three complementary studies from Sylvester researchers link environmental pollution, socioeconomic adversity, and breast cancer severity—highlighting the urgent need to address the health consequences of living near toxic waste sites.
Environmental Exposure and Cancer Risk
Superfund sites—locations identified by the Environmental Protection Agency (EPA) as requiring cleanup due to hazardous waste—pose significant public health threats. In Florida alone, 52 active Superfund sites are currently under remediation.
Community members near these sites voiced concerns about unusually high cancer rates. “Residents began to suspect that where they lived was making them sick,” said Dr. Erin Kobetz, Ph.D., M.P.H., an epidemiologist and associate director for community outreach and engagement at Sylvester. “Evidence increasingly shows that proximity to environmental contamination is linked to poorer health outcomes.”
Using the SCAN360 data portal, Kobetz’s multidisciplinary team analyzed over 21,000 Florida breast cancer cases diagnosed between 2015 and 2019. Their results were striking: women living in census tracts containing at least one Superfund site were 30% more likely to be diagnosed with metastatic breast cancer.
Further investigation revealed a strong correlation between triple-negative breast cancer (TNBC)—a particularly aggressive form resistant to most therapies—and exposure to fine particulate matter (PM2.5). Elevated PM2.5 levels, often produced by industrial emissions and waste, were linked to higher TNBC incidence across South Florida.
These studies, published in Scientific Reports and Cancer Epidemiology, Biomarkers & Prevention, underscore the pressing need to consider environmental pollution as a major cancer risk factor.
Molecular Evidence: How Pollution Leaves Its Mark
Beyond exposure, Sylvester researchers explored the biological imprint that toxic environments might leave inside the body. A team led by Dr. Aristeidis Telonis, a molecular biologist at the Miller School, examined tumor samples from 80 breast cancer patients in Miami. They analyzed not only DNA but also the epigenome (chemical instructions that regulate gene activity) and RNA (real-time cellular messages).
The analysis revealed a clear link: patients from neighborhoods with fewer health-promoting resources—such as access to healthy food, healthcare, and clean air—displayed distinct biomarkers tied to more aggressive cancers.
“This deprivation index is strongly associated with worse tumor biology,” Telonis said. “It’s a simple but powerful connection between a person’s environment and how their disease behaves at the molecular level.”
These insights open doors to personalized cancer care that considers both biology and community context. “The future of oncology should integrate tumor characteristics with a patient’s environmental and social background,” Telonis emphasized.
Community Science Leading Change
“This research was born from community voices,” Dr. Kobetz said. “Residents asked the right questions—and now science is confirming their concerns.”
The Sylvester team continues to collaborate with local advocacy groups to map risk, identify intervention targets, and promote equitable access to cancer prevention resources.
“These studies are only the first puzzle pieces,” Kobetz concluded. “The next step is ensuring that environmental justice becomes an integral part of cancer prevention.”
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