BBC News is reporting that the British Medical Journal has published a retrospective study to determine if cellular phones (mobiles in Britain) increase the risk of brain tumors.

The study involved interviewing 966 people diagnosed with brain tumors and 1,716 people without spread over 5 regions of Great Britain. The conclusions are that there is no apparent increase in risk, regardless of how long they've been using cell phones, how much time they spend on them, or whether they've used mostly analog or digital phones.

However, one interesting tidbit is that for the people who did have the form of brain tumors they were researching (glioma), they did find an increased likelihood that the tumor would be on the side of the head they most commonly used their phone on.