Hi Tcpolchies,
I hope today was a good day for you. I don't know anything about stomach cancer, but when I am trying to find out the steps of diagnosing or signs and symptoms of something I go to Mayo Clinic's website. They explain things in terms I can understand without being to technical. Here is the link if you would like to take a look at the stomach cancer information.
http://www.mayoclinic.com/health/stomach-cancer/DS00301
Take care and let me know how you are doing, okay
Di