NHS Choices has featured an assessment of media reports of a study which evaluated the link between mobile phone use and the risk of brain tumours.
The study in question looked at national records and mobile phone subscription registries for all adults aged 30 and over in Denmark between 1987 and 2007. Researchers used the data to compare the risks of getting brain cancer among those who were mobile phone subscribers and those who were not. It found no increased risk of brain cancer among either male or female mobile phone users, even among those who had used them for the longest period (13 years or over).
Please see links below for the NHS Choices assessment, and the abstract of the study published in the British Medical Journal.