Almost two decades of research has not decisively concluded whether or not there is a direct link between cell phone use and certain brain cancers.

Since so many of us use cell phones it is diffucult to conclude a causal relationship between the two, especially given the rarity of some of the cancers.

…Siddhartha Mukherjee, an assistant professor of medicine at Columbia University, found that despite years of research by scientists around the world, there has never been a conclusive study linking cellphone use and brain cancer — but no study conclusively ruled it out, either.