Kathy Griffin revels she was in surgery Monday to remove a tumor from her lung

, two weeks after she got the shocking diagnosis — made even more surprising because she has never smoked.

Griffin’s doctors “are very optimistic” that the cancer is stage one and contained to her left lung, she said.

“It’s been a helluva 4 years, trying to get back to work, making you guys laugh and entertaining you, but I’m gonna be just fine,” Griffin wrote, apparently referencing backlash that followed a controversial photo shoot she did holding a fake, bloody head that resembled Donald Trump.

I've got to tell you guys something. I have cancer. I'm about to go into surgery to have half of my left lung removed. Yes, I have lung cancer even though I've never smoked! The doctors are very optimistic as it is stage one and contained to my left lung. Hopefully no chemo or radiation after this and I should have normal function with my breathing. I should be up and running around as usual in a month or less. It's been a helluva 4 years, trying to get back to work, making you guys laugh and entertaining you, but I'm gonna be just fine. Of course I am fully vaccinated for Covid. The consequences for being unvaccinated would have been even more serious. Please stay up to date on your medical check ups. It'll save your life. XX00,KG