The New Yorker's Malcolm Gladwell is out with an article on the very imperfect art/science of mammogram-reading. MedRants focuses in on the litigation implications; there's an enormous leeway to second-guess the readings of radiologists and others who read mammograms. For more, see Overlawyered, Jun. 14, 2004 and Oct. 3, 2003.
Gladwell on mammography