Agricultural workers exposed to high levels of pesticides have a raised risk of brain tumours, research suggests. All agricultural workers exposed to pesticides had a slightly elevated brain tumour risk, the French study found, but the paper published online by the journal Occupational and Environmental Medicine reported the risk was more than doubled for those exposed to the highest levels.

Dorothée Provost and others. Brain tumours and exposure to pesticides: a case-control study in, southwestern France, Occupational and Environmental Medicine, published online 30 May 2007; doi: 10.1136/oem.2006.028100. BBC News Online.