A World Health Organization working group says that the radiation emitted by mobile phones may cause brain tumors, reports Scientific American. The panel, made up of 31 experts from 14 countries reviewed the scientific literature to find that there was some, though limited, evidence linking mobile phone use to gliomas and noncancerous acoustic neuromas, and, as NPR's Shots blog notes, this conclusion is a bit of a surprise: a WHO study from last year said there was little evidence of a link between cell phones and brain cancer. (NPR also has a background sheet on cell phones and cancer risk here.) "The evidence, while still accumulating, is strong enough to support a conclusion," said Jonathan Samet, who chaired the panel, in a statement. "There could be some risk, and therefore we need to keep a close watch for a link between cell phones and cancer risk."
The full report is to appear in Lancet Oncology in July.