OMAHA, Neb. >> Warren Buffett is telling shareholders in an open letter he has been diagnosed with early-stage prostate cancer. 

The 81-year-old billionaire investor and CEO of Berkshire Hathaway Inc. says in the letter, released today, that his condition is “not remotely life-threatening” or debilitating. 

Buffett’s letter says he and his doctors have decided on a two-month treatment plan to begin in mid-July. 

Buffett says he was diagnosed April 11 and has received tests including a CAT scan, a bone scan and an MRI. 

He says he feels “great — as if I were in my normal excellent health.”

The cancer was detected with a routine prostate cancer test.