Do Cell Phones Cause Brain Cancer?

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Asked on September 14, 2018 in Health.
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It’s unlikely. Most research — including a study of more than 420,000 people over 20 years — says there’s no connection between brain tumors and cell phone use. A more recent study, though, found a link between a specific type of brain tumor called a glioma and heavy cell phone use. If you’re worried, wear a headset, use the speaker, and limit your phone time.

Answered on September 17, 2018.
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The possible connection between cellphones and cancer is controversial. Many years’ worth of studies on cellphones and cancer have yielded conflicting results. Currently, there’s no consensus about the degree of cancer risk — if any — posed by cellphone use.

The primary concern with cellphones and cancer seems to be the development of brain tumors associated with cellphone use. Some research suggests a slight increase in the rate of brain tumors since the 1970s, but cellphones weren’t in use during the 1970s. Instead, the subtle increases are more likely related to other factors — such as increased access to medical care and improvements in diagnostic imaging.

So what have researchers learned about cellphones and cancer? Here’s an overview of various studies:

  • In one study that followed more than 420,000 cellphone users over a 20-year period, researchers found no evidence of a link between cellphones and brain tumors.
  • Another study found an association between cellphones and cancer of the salivary glands. However, only a small number of study participants had malignant tumors.
  • Another study suggested a possible increased risk of glaucoma — a specific type of brain tumor — for the heaviest cellphone users, but no increase in brain tumor risk overall.

After evaluating several studies on the possibility of a connection between cellphones and glioma and a noncancerous brain tumor known as acoustic neuroma, members of the International Agency for Research on Cancer — part of the World Health Organization — agreed that there’s limited evidence that cellphone radiation is a cancer-causing agent (carcinogenic). As a result, the group classified radiofrequency electromagnetic fields as possibly carcinogenic to people.

Still, a series of recent studies can’t tell the entire story. It often takes many years between the use of a new cancer-causing agent — such as tobacco — and the observation of an increase in cancer rates. At this point, it’s possible that too little time has passed to detect an increase in cancer rates directly attributable to cellphone use.

The bottom line? For now, no one knows if cellphones are capable of causing cancer. Although long-term studies are ongoing, to date there’s no convincing evidence that cellphone use increases the risk of cancer. If you’re concerned about the possible link between cellphones and cancer, consider limiting your use of cellphones — or use a speaker or hands-free device that places the cellphone antenna, which is typically in the cellphone itself, away from your head.

Answered on September 17, 2018.
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