When I read of a high profile guy like this being diagnosed with an advanced stage cancer or any illness, I wonder what kind of medical care he was receiving over the years.
For all of you out there, if you have acid reflux (and, if you have it, you know you have it) and are downing Tums or some other OTC antacid like it's going out of style, get your sorry butts to a good GI doctor, get an endoscopy and take it from there.
Believe me, I know from my own experience. I had an endoscopy about 15 years ago, which my doctor asked me to get on what he called a "hunch," after I told him I had acid reflux and was taking a lot of Tums. The test showed early signs of damage (but nothing even close to malignant yet). He put me on medication, the damage was reversed in about a year and I get an endoscopy every three years just to be sure.
Do it!