This weekend is graduation at Stanford. The commencement speaker for Saturday's medical school ceremony is a Stanford doctor, professor and now patient. Dr. Bryant Lin is fighting stage four lung cancer.

"Eventually got an X-ray, big white area here in my right lung," Lin said. "I got two tumors in my lung, a tumor in my liver and in my bones, but I’m not in pain."

Lin got his diagnosis about a year ago. His good health has been stripped away, but his hope and humor was still intact when NBC Bay Area met with him at Stanford's medical library in Palo Alto.

"I mean I knew life was short before, but now I really know life is short," Lin said. "Humor is a big part of it honestly – how I cope and deal with this illness, which honestly sucks."

Lin, a non-smoker, is the co-founder of Stanfor

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