Millions of American women went on hormone therapy when it promised to protect against heart disease. Millions went off the pills when subsequent studies showed little protection and increased risk of breast cancer. New findings show the cancer danger from estrogen-progestin therapy may be even worse than first thought.

Are physically active women less likely to develop breast cancer? The latest evidence says yes. And new findings also suggest who’s most likely to benefit.

New findings pose an unsettling question that women and their doctors may face when mammograms detect breast cancer. Is the tumor a real threat, or a cancer that might go away on its own?

Researchers never expected to win the war against cancer with a single decisive blow. But thanks to a growing number of small but important advances, medicine has been gaining ground. The latest evidence comes in a report just published in the Journal of the National Cancer Institute.