Last updated on: 2/14/2017 | Author:

Larry Junck, MD Biography

Professor of Neurology at the University of Michigan Medical School
Pro to the question "Is Cell Phone Radiation Safe?"

“Consider that brain tumors have not increased in incidence in correlation with cellphone use. If cellphones were an important cause of brain tumors, we would have seen an increase perhaps starting in the 1990s, when cellphones came into widespread use, or starting several years later, if it took several years of cellphone use to cause a brain tumor. While the number of people diagnosed with brain tumors has risen, the increase has been mainly among the elderly, who use cellphones less than others. The increase started before the 1990s, and the numbers have leveled off. The increase is believed to be largely due to our improved detection of brain tumors using CT scans and MRI.

Also, there is no known scientific mechanism by which mobile phones might cause brain tumors. For carcinogenic chemicals and other environmental causes of cancer, we can generally show that these cause mutations in DNA or changes in other molecules, sufficient to explain the resulting cancers. However, radiofrequency emissions such as those emitted by cellphones generally pass through tissues without causing these effects.

Numerous epidemiologic studies considered together do not conclusively show an increase in risk of brain tumors associated with cellphone use.”

“Should Cellphones Have Warning Labels?,”, May 22, 2016

Involvement and Affiliations:
  • Director, Neuro-Oncology Program, University of Michigan Medical School, 2001-present
  • Professor of Neurology, University of Michigan Medical School, 1983-present
  • Member, CNS Panel of the National Comprehensive Cancer Network of the National Cancer Institute
  • MD, University of Michigan Medical School, 1976
  • Recipient, Outstanding Clinician Award, U-M Medical School, 2006
Quoted in:
Pro & Con Quotes: Is Cell Phone Radiation Safe?