Can a fistula from roux-en-y bypass in 1997 be cause of gastric pain; bloating; fullness w/ small amnts. of food and wt. loss of 76 pounds in 4 mos.?

Yes: A fistula --- s/p surgery ( any kind) is an " unwelcome" complication of the surgical procedure. It needs to be corrected asap. And just becoz, in this case it involves- abdominal surgery, it can cause all the mentioned symptoms.

See surgeon ASAP: A fistula is an abnormal connection from one part of the intestinal tract to another, or to the skin. After a Gastric Bypass, a person could get weight re-GAIN due to a fistula from the pouch to the old stomach. What you are describing sounds more like a stenosis (narrowing due to scar tissue) of the connection from your pouch to the intestines. An ulcer could also cause this. See your surgeon!