? I have noticed that when I am doing abdominal exercises, a new thing for me in the last 3 weeks, I can see a bulging in my upper stomach. When I push on it, I can actually hear it go down. It appears to be where the esophagus and stomach meet. I do not have any discomfort, but I have been suffering from nausea for the last 6 months which I assumed was GERD, and I take medication for that. It has been really hard for me to lose wt in my upper stomach in spite of lots of crunches, ab ball, and yoga. Could this be a stomach tumor? The circumferance is the size of a golf ball, but it does not necessarily feel hard, maybe more like a cyst. It may have been there a long time, as my abs have become a concern for me at age 60- go figure. I fear that I could have stomach cancer, but I am an alarmist.