I know how you feel,my dad was diagnosed with esophageal cancer this past October and some was in his stomach...since then he had reconstruction surgery(which hes still in the hospital for) the Dr. said he removed all the cancer but thier was still tiny cancer cells left that could only be seen with a biopsy so he needs to have chemotherapy.
The Dr. said esophageal cancer had become quite common but can be fixed if found early.The problem is that esophageal/abdominal cancer has mostly the same symptoms as acid reflux and ulcers.
So,based on my dads doctor...yes you can survive it.
Hope things turn out well