Story highlights The source said Romney's prognosis is "good" 
 
 Romney is being widely encouraged to run for Utah Sen. Orrin Hatch's seat in 2018 
 
 Washington (CNN) Former GOP presidential nominee Mitt Romney was treated for prostate cancer over the summer, a source close to Romney told CNN Monday. "He was treated surgically by Dr. Thomas Ahlering at UC Irvine Hospital in California," the source said. Romney’s treatment, which involved surgery at the University of California-Irvine Medical Center, was successful, and he has a good prognosis, the sources said. "Last year, Governor Mitt Romney was diagnosed with slow-growing prostate cancer," an aide to Romney told NBC News. A Romney aide added that the cancer was removed surgically and found not to have spread beyond the prostate. Romney is said to be seriously considering running for the Senate seat being vacated by Utah Republican Orrin Hatch, who announced last week he would retire at the end of his term this year.
– Mitt Romney's name has grabbed headlines lately on the heels of Utah Sen. Orrin Hatch's retirement announcement as a likely successor. Now, news of a different sort, by way of a CNN source who says the Republican was "treated surgically" for prostate cancer over the summer at UC Irvine Hospital in California. The unnamed source described the treatment as successful and the prognosis as "good." NBC News and Fox News say their sources confirm the story.