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Effects of radiofrequency electromagnetic field exposure on cancer in laboratory animal studies, a systematic review

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Mevissen et al · 2025

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Animal studies provide high-certainty evidence that RF-EMF exposure increases brain and heart tumors, matching human epidemiological findings.

Plain English Summary

Summary written for general audiences

This comprehensive 2025 review analyzed 52 animal studies to evaluate whether radiofrequency electromagnetic field exposure causes cancer. Researchers found high-certainty evidence for increased brain tumors (gliomas) and heart tumors (schwannomas) in male rats, the same tumor types previously linked to cell phone use in humans. The findings strengthen concerns about RF-EMF carcinogenicity that led to its classification as a possible human carcinogen in 2011.

Why This Matters

This systematic review represents the most comprehensive analysis of RF-EMF cancer studies in laboratory animals to date, and its findings are deeply concerning. The researchers identified high-certainty evidence for the same tumor types in animals that have been linked to cell phone use in humans: brain gliomas and heart schwannomas. This convergence between human epidemiological studies and controlled animal experiments significantly strengthens the case for RF-EMF carcinogenicity.

What makes these findings particularly relevant is that the radiofrequency exposures used in these studies are comparable to what millions of people experience daily from cell phones, WiFi routers, and other wireless devices. The fact that tumors occurred even at relatively low exposure levels, with one study showing effects at benchmark doses as low as 0.177, suggests that current safety standards may be inadequate. The reality is that this evidence, combined with mounting human studies, calls for immediate precautionary action rather than waiting decades for absolute proof as we did with tobacco.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
Mevissen et al (2025). Effects of radiofrequency electromagnetic field exposure on cancer in laboratory animal studies, a systematic review.
Show BibTeX
@article{effects_of_radiofrequency_electromagnetic_field_exposure_on_cancer_in_laboratory_animal_studies_a_systematic_review_ce4650,
  author = {Mevissen et al},
  title = {Effects of radiofrequency electromagnetic field exposure on cancer in laboratory animal studies, a systematic review},
  year = {2025},
  doi = {10.1016/j.envint.2025.109482},
  
}
DOI: 10.1016/j.envint.2025.109482PubMed: 40339346

Quick Questions About This Study

Brain gliomas and heart schwannomas in male rats showed high-certainty evidence of increased risk. These are the same tumor types previously identified with limited evidence in humans by the International Agency for Research on Cancer.
The review included 52 studies with 20 chronic bioassays, involving thousands of laboratory animals (mice and rats). No studies were excluded due to bias concerns, making this the most comprehensive analysis available.
Heart schwannomas occurred at benchmark doses as low as 0.177 (95% CI 0.125-0.241) in one study. This suggests that even relatively low RF-EMF exposure levels may pose cancer risks in sensitive individuals.
Studies were too different in design, animal species, exposure characteristics, and cancer outcomes to combine statistically. However, the narrative synthesis still identified consistent patterns across multiple independent studies.
Yes, the tumor types with high-certainty evidence in animals (brain gliomas and heart schwannomas) are the same as those identified with limited evidence in humans by IARC's cell phone cancer evaluation.