Warren Buffet
Billionaire investor Buffet wrote a letter to shareholders of his holding company, Berkshire Hathaway, in 2012 announcing he had been diagnosed with Stage 1 prostate cancer. The tycoon underwent a two-month treatment of daily radiation and has maintained an active surveillance approach to the organ, which entails undergoing annual or semiannual prostate biopsies and routine blood tests for high levels of PSA.
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