Yet another blast from Republican presidential candidate Ben Carson‘s past has come back to haunt the former brain surgeon. This time, however, the controversy has more to do with alleged instances of medical malpractice than his comments onthe Oregon shooting.

No, we’re not talking about Carson’s cameo in the 2003 comedy Stuck on You. This has more to do with a National Enquirerstory that was linked to by the Drudge Report on Thursday morning. The story, which Drudge dubbed “NATIONAL ENQUIRER TAKES SCALPEL TO BEN CARSON; LEFT SPONGE IN PATIENT’S BRAIN!” discusses allegations of malpractice from Carson’s days as a neurosurgeon.

Fox News Radio host Alan Colmesbrought up the story on Wednesday when Carson was his guest. When he asked the second-most popular GOP presidential contender about the claims, Carson responded in kind.

“My reaction is that I did 15,000 operations,” he said, “and the people who oppose me have been crawling through every ditch, every place I’ve ever been my whole life looking for stuff. They found five or six disgruntled people, that’s a very small number, and many of those cases never went anywhere, because the legal system said, ‘Are you kidding me?’ and threw it out. But the point is you don’t discuss that kind of stuff in public, number one.”

“Number two,” Carson continued, “that’s not for public discussion by any stretch of the imagination. And I would probably find myself in some difficulty if I do begin to discuss that stuff publicly…

Read More: Ben Carson Responds to Report That He Left Sponge In Patient’s Brain | Mediaite