The Food and Drug Administration is warning doctors not to use a once-popular gynecologic surgical device that can spread undetected cancer. 

The device called morcellators are used to remove a woman's uterus by grinding it up, reported NBC News. The procedure was recently found to spread cancer if a woman received the treatment with undiagnosed cancer cells in her uterus, leading to the FDA deeming the procedure risky.

"We believe that in the vast majority of women, the procedure should not be performed," Dr. William Maisel of FDA's Center for Devices and Radiological Health, told reporters Monday.

Some gynecologists are arguing that the FDA's ruling is "confusing" and missing important pieces of evidence against it, reported NBC News. 

The FDA is putting a high risk label on all surgeries performed with morecellators, which representing gynecologists who are against the ruling are focusing on in their arguments. 

The surgery device is also commonly used by gynecologists in low-risk procedures such as removing a prolapsed uterus, reported NBC News.