Cell phones / electromagnetic fields (no proven link)

What it is

Despite widespread public concern and extensive scientific study, cell phone use and exposure to everyday electromagnetic fields have not been proven to cause gliomas. Major reviews of the evidence have not found convincing proof of an increased risk.

Understanding Cell phones / electromagnetic fields (no proven link)

The possibility that cell phones (which emit radiofrequency energy) might cause brain tumors has been intensively studied, given how common their use is. To date, the overall body of evidence has not established a causal link between cell phone use and gliomas: large studies and reviews have generally not found a convincing increase in glioma risk, and glioma rates have not risen in the way that would be expected if cell phones were a significant cause. Some organizations have classified radiofrequency fields as a "possible" carcinogen, reflecting scientific caution and the desire for continued study, but this is not the same as established causation. Research continues, but no proven link exists. For people who wish to reduce exposure, simple measures (such as using speakerphone or headsets) are sometimes suggested, though they address a hypothetical rather than established risk. Understanding this clarifies that cell phones are not a proven cause of gliomas.

Why it matters

Understanding the cell phone question helps patients and families put a common worry in perspective — extensive research has not proven that cell phones cause gliomas, even though study continues.