In 2009, Connecticut became the first state to pass legislation requiring that women who have dense breasts be informed that dense breast tissue may make it harder for radiologists to see images of existing tumors on mammograms. By early 2014, 13 additional states passed similar laws and more are considering their passage. Erin Marcus, M.D., an internist and faculty member at University of Miami Miller School of Medicine, is currently studying ways to make that communication ...