The World Health Organization yesterday placed cellphones on its list of items that can potentially cause cancer in humans, based on studies suggesting there might be a small increased risk of glioma, a rare brain cancer, from heavy use of the mobile device. The group said the evidence of harm from cellphones is limited and is based on inconclusive research, but warrants classification of the phones as “possibly carcinogenic to humans’’ — a category that includes 266 items, from gasoline exhaust to dry cleaning agents to talcum powder. WHO officials suggested that consumers take precautions to keep their mobile phone antenna away from their head by using hands-free devices or the speaker phone feature, or texting when possible.


