Cancer

A definitive link between regular cell phone use and brain tumors hasn't been found, but few experts are ready to dismiss the possibility. Most recommend circumspect use of the devices, an ergonomic approach to managing risk, while the search for answers continues. The latest study, from Denmark, also found no link, but hastens to point out that conclusions about risk would be premature.

The weakened immune systems of people with HIV puts them at increased risk for at least seven types of cancer, but early diagnosis and treatment of HIV infection could help delay the onset of some of these cancers, a new study suggests.

Antioxidant supplements do not appear to be associated with an increased risk of melanoma, according to a report in the August issue of Archives of Dermatology, one of the JAMA/Archives journals.

Heavy drinking, especially when it's beer, increases the risk for highly aggressive prostate cancer, a new study finds.