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Letters |

Handheld Cellular Telephones and Brain Cancer Risk

Lennart Hardell, MD, PhD; Kjell Hansson Mild, PhD
JAMA. 2001;285(14):1838-1839. doi:10.1001/jama.285.14.1838.
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To the Editor: Dr Muscat and colleagues1 excluded benign brain tumors, such as meningioma, from their study. Ionizing radiation, however, is a known risk factor for meningioma.2

Muscat has stated that most of the case patients were interviewed within 24 to 48 hours after brain surgery.3 This may bias the reporting of exposure since most patients would not have recovered from surgery at that time. Control subjects were interviewed on average 5 months later than the case patients. This may further bias the results since the frequency of use of cellular telephones increases over time.

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