Just the other week, had a 60 year old guy, reeking of cigarettes, come in for upper endoscopy (camera to look at the esophagus, stomach and part of the small bowel).

He was describing food getting stuck mid swallow in the middle of his chest.

"I think it's esophagus cancer" he said.

I was thinking that too, but didn't say anything. Sure enough, that's exactly what it was.