One of the toughest things I do as a physician is deal with uncertainty. Doctors are often only as good as their diagnostic tests, and those tests aren't perfect. Too often we are forced to say, "You might have cancer"--which leads to lots of fear, anxiety and lost sleep. It is also often the beginning of an arduous process of more tests and in some cases surgical procedures. The only way to be absolutely sure about cancer is to examine some of the suspicious cells under a microscope. That means a biopsy. And in the U.S. we perform more than a million breast biopsies...
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