Microplastics Found in 90% of Prostate Cancer Tumors

A Troubling Discovery Inside Tumors

Scientists at NYU Langone Health have found tiny plastic fragments embedded deep within prostate cancer tumors, with cancerous tissue harboring significantly more of these particles than healthy tissue nearby. The pilot study, presented on February 26 at the American Society of Clinical Oncology (ASCO) Genitourinary Cancers Symposium, marks the first Western research to directly compare microplastic concentrations between malignant and noncancerous prostate tissue.

The findings arrive at a moment of growing scientific alarm over the ubiquity of microplastics in the human body. But this study goes further than most: it suggests a possible link between plastic accumulation and one of the most common cancers affecting men worldwide.

What the Data Shows

Researchers examined tissue samples from 10 men with prostate cancer (average age 65) who had undergone radical prostatectomy. Using two detection methods — pyrolysis-gas chromatography/mass spectrometry and Raman microscopy — they screened for 12 types of plastic polymers.

The results were striking:

• Microplastics were detected in 90% of cancerous tumor samples
• Plastics were found in 70% of adjacent healthy tissue samples
• Tumor tissue contained 2.5 times more plastic than noncancerous tissue — approximately 40 micrograms per gram versus 16 micrograms per gram in healthy prostate tissue

The most commonly identified plastic types were nylon-6 and polystyrene, as well as polyethylene and its copolymers — materials found in everyday packaging, clothing fibers, and food containers.

"Surprising and Concerning"

Lead author Dr. Stacy Loeb, professor of Urology and Population Health at NYU Grossman School of Medicine, described the concentration gap between tumor and healthy tissue as "very surprising and concerning," adding that it "raised questions over whether it could have an association with the development of prostate cancer."

"Our pilot study provides important evidence that microplastic exposure may be a risk factor for prostate cancer." — Dr. Stacy Loeb, NYU Langone Health

Senior author Dr. Vittorio Albergamo said the findings highlight "the need for stricter regulatory measures" limiting public exposure to plastics. The research was funded by the U.S. Department of Defense.

How Plastics Might Fuel Cancer

Researchers propose several potential biological mechanisms. Microplastics may cause oxidative cellular damage, impair immune function, promote chronic inflammation, and act as carriers for known carcinogens — including phthalates and bisphenols — that leach from plastic materials into surrounding tissue.

Independent experts echoed the urgency. Dr. Michael Eisenberg of Stanford University noted that scientists "are finding many signals about the astonishing prevalences of micro/nanoplastics and the concerning associations with health problems." Dr. Andrea Viale of MD Anderson Cancer Center said the findings "deserve really serious attention" from a public health perspective.

Important Caveats

The study's authors are careful to note its limitations. With only 10 participants, this remains a small pilot study that has not yet undergone peer review. No causal relationship between microplastics and prostate cancer has been established — the elevated concentrations in tumors could reflect accumulation rather than causation. The team is now expanding their research to examine microplastics in other genitourinary cancers.

A Call for Action

Prostate cancer is the most common cancer among American men, affecting roughly 1 in 8 over their lifetimes. If microplastic exposure proves to be a contributing environmental factor, the implications for prevention, regulation, and everyday consumer behavior would be profound. Researchers are calling for larger, longitudinal studies — and for policymakers to take the mounting evidence on plastic pollution seriously, not just as an ecological concern, but as a direct threat to human health.