I don't know why...good question. I specifically went for the sleeve because it did remove part of the stomach and left the rest in tact. I can get an endoscopy and still get everything checked. My gastroenterologist said that with the bypass they may have to do a surgery to go in and look at the remaining stomach etc...if there were any concerns about cancer etc... That convinced me that sleeve was the way to go.
Why is "unused" stomach and small intestines left in, in gastric bypass
in POST-Operation Weight Loss Surgery Q&A
Posted
You can still have an endoscopy with a bypass. I've just had one myself [emoji16]