Cellphone users worried about getting brain cancer aren't off the hook yet. A major international study into the link between cellphone use and two types of brain cancer has proved inconclusive, according to a report due to be published in a medical journal.
A 10-year survey of almost 13 000 participants found most cellphone use didn't increase the risk of developing meningioma - a common and frequently benign tumour - or glioma - a rarer but deadlier form of cancer.
There were "suggestions" that using cellphones for more than 30 minutes each day could increase the risk of glioma, according to the study by the World Health Organisation's International Agency for Research on Cancer. But the authors added that "biases and error prevent a causal interpretation" that would directly blame radiation for the tumour.