http://www.telegraph.co.uk/news/health/news/11542425/Simple-blood-test-for-breast-cancer-could-be-more-accurate-than-mammograms.html

Blood tests could identify an increased risk of breast cancer long before mammograms can spot it, research suggests

Simple blood test for breast cancer could be more accurate than mammograms

A new type of blood test could predict breast cancer up to five years before it develops, Danish scientists say

for complete article press above link