One of the primary ways of treating brain cancer is surgically removing the tumors. The risk of this sort of procedure is obvious -- it involves cutting away tissue from the brain, potentially severing nerve fibers and causing neurological damage.

A sweeping review of research studies of aspartame says there is no evidence that the non-nutritive sweetener causes cancer, neurological damage or other health problems in humans

Researchers have called for a national database to be set up to identify major complications arising from epidural pain relief after a small number of serious problems were identified during a six-year UK study, according to the April issue of Anaesthesia.