NEW YORK (CBSNewYork) – Curtis Sliwa, the gregarious founder of the Guardian Angels, ubiquitous talk-show staple, and frequent competitor in the Nathan’s Famous Fourth of July Hot Dog Eating Championship, is in the fight of his life.

Sliwa announced on his radio show Wednesday morning that he has been diagnosed with prostate cancer about a year ago and is planning to undergo surgery today.

Sliwa was shot in 1992 on the orders of mobster John Gotti. As a result a treatment that might ordinarily be helpful in battling prostate cancer is not available to him, reported the Daily News.