Former Massachusetts Gov. Mitt Romney was treated for prostate cancer last year, according to multiple news reports.

The 70-year-old 2012 GOP presidential candidate — seen as a likely U.S. Senate candidate in Utah this year — had surgery at a California hospital over the summer, sources told several media outlets.

“His prognosis is good; he was successfully treated,” one former aide to Romney told CNN’s Jake Tapper.

An ex-campaign adviser to Romney did not immediately respond to a request for comment from the New York Daily News.

Rumors have swirled that Romney is considering a run for retiring U.S. Sen. Orrin Hatch’s seat in Utah — seen as safe Republican territory. Romney, who is popular in Utah, unsuccessfully challenged Democratic Sen. Edward M. Kennedy in Massachusetts in 1994. He was elected governor in 2002. He ran failed presidential campaigns in 2008 and 2012.

In 2016, Romney publicly attacked then-presidential candidate Donald Trump, saying in March 2016, “Let me put it plainly, if we Republicans choose Donald Trump as our nominee, the prospects for a safe and prosperous future are greatly diminished. His is not the temperament of a stable, thoughtful leader. His imagination must not be married to real power.”

But Romney later met with President Trump, reportedly to discuss the secretary of state Cabinet post.

He has declined to confirm whether he’s considering a Senate run.

Herald wire services contributed to this report.