That means more concentrated clusters of glands and tissue, as opposed to fat. So the 2D, black-and-white images of a typical mammogram x-ray likely didn't catch the tumor her mom had until it had ...

That means more concentrated clusters of glands and tissue, as opposed to fat. So the 2D, black-and-white images of a typical mammogram x-ray likely didn't catch the tumor her mom had until it had ...