Everything else on the films was normal (pancreas, appendix, liver, etc. )
I went to see a gastro doctor. Since I also have a history of hiatal hernia
and some esophagitis, he recommended getting both colonoscopy and another endoscopy done at the same time. He also recommended general anesthesia so that I would be more comfortable (when I had my first endoscopy, I woke during the procedure, then after I vomitted a lot - presumably a bad reaction to the typical versed-type sedative).