Study sees benefit from more extensive breast cancer surgery

Having a little extra tissue taken off during breast cancer surgery greatly lowers the risk that some cancer will be left behind and require a second operation, according to a new study that could change care for more than 100,000 women in the United States alone each year. Women having a lump removed dread learning there was a positive margin, an area at the edge of the tumor that looked healthy but turned out to harbor cancer when studied later.