Tonight, to a major headline now involving women and their health. The FBI investigating a widely used surgical device suspected of spreading cancer in some women. It's main manufacture, Johnson &... See More
Tonight, to a major headline now involving women and their health. The FBI investigating a widely used surgical device suspected of spreading cancer in some women. It's main manufacture, Johnson & Johnson, eventually pulling it off the market. But tonight, the FBI now asking, who knew what and when? Here's ABC's Mara schiavocampo. Reporter: Tonight, a medical device that can put women at greater risk of deadly uterine cancer is the subject of an FBI investigation, including what the largest maker of the device, Johnson & Johnson, knew about the risks and when they knew it. Johnson a& Johnson first alerted to the possible risks in 2006 by a pathologist. Soon others in the medical alarm, and Johnson & Johnson removed it from the market last July. The fda implementing its most serious warning on the device last November. The surgical device, the power morcellator, breaks down growths in the uterus so they can easily be removed. But in up to 1 in 350 cases, an unknown cancer is hidden in that fibroid. And in these cases, the morcellator can spray those cancer cells within the uterus spreading and potentially worsening the disease. Which is what Dr. Amy reed and her husband say happened in her case. If you disrupt the mass, it's like a bee's hive. If you start chopping it up, the beeps spill all over the place and you're in trouble. Reporter: We reached out to Johnson & Johnson, who told us they have not been contacted by the FBI, adding, so far, they are the only manufacturer to have pulled the device. Others do remain on the market with that fda blackbox warning. David? Mara, thank you. Now, to the race for 2016.
This transcript has been automatically generated and may not be 100% accurate.