Bob -did you mean endoscopy?
What the doc is describing is just Latin and doc-speak for irritated, red, stomach that bleeds easily when touched. It wasn't caused by the surgery. He may mean that there is some irritation in the esophagus too, but there was not enough information. Maybe you have something else going on that causes ulcers. Did he prescribe a PPI? Maybe something to coat the stomach?
It could possibly be that the foods you are eating is causing the problem. It's very possible to get new allergies and intolerances at any time in life. Keeping a food log with time, everything you eat and drink and any symptoms in half an hour, an hour and 2 hours might be useful.
I would definitely be avoiding any foods and beverages that are the slightest bit irritating - coffee, tea, sodas, spices ...