What exactly is an ultrasound? How does it work? And why does my doctor want me to have one? Everything you need to know about breast ultrasound: the what, how, and why of this common screening device.Q. I went for my regular mammogram, and I got a callback for another view. Now they want to do an ul...



As a person who had a history of cysts between age 40 and 50, I agree that ultrasounds are about as easy as a medical test gets. What is especially gratifying is the immediate confirmation that the lump isn't dangerous because cysts are so clear on the screen. Thanks, PJ, for providing this clear explanation.