At 60, it's one in 24. At 70, it's one in 14. At 85 is when the risk gets down to one in 8 or 9. Risk factors, too, are murky. For example, researchers deem 5 percent to 10 percent of cases to be hereditary.
Scientists can offer only educated guesses about the remainder.
That's a heavy dose of speculation trickling down to doctors and patients. Issues of heredity have become an even hotter topic as scientists learn more about testing for defective genes that might cause cancer. For women without disease, many questions remain unanswered about whether genetic tests might dictate any difference in screening or treatment. Study shows that exercising reduces depression and anxiety. It's 9 a.m. on Saturday and Bonnie Conne is fighting breast cancer with all the might and muscle in her body.