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 Tuesday, 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.