Friday, April 6, 2007 - A new report shows fewer American women are dying of breast cancer. Breast cancer death rates among women in the U.S. declined 24% from 1990 to 2003. The biggest reduction was among women under age 70 with estrogen-sensitive breast cancer. Researchers attribute the drop to the development of drugs that treat estrogen-sensitive breast cancer and widespread use of mammography.

At the same time, a computer program that helps radiologists detect cancer spots on mammograms may do more harm than good. Computer-aided detection programs use software to mark suspicious areas for radiologists to review. Researchers studied screening outcomes among women whose mammograms had the new technology and compared them to those that didn't. They found 30% more women were called back for more tests and 20& more women had a breast biopsy in the computer-aided detection group.

A new study from Temple University suggests that teenage brains are simply too immature to avoid risky behavior like smoking, binge drinking or driving too fast. Brain imaging has shown that brains aren't fully developed until after age 18. In fact, the area of the brain thtat controls impulse and emotions develops later than the area that controls logic and reasoning.