A relative had a test where a camera was inserted down his throat into his stomach and a biopsy was done at the same time. What are they looking for? Also are there non invasive methods to check for the same thing?
I had one done (as well as a camera up) to check for Crohns or anything else which was causing my symptoms. They found some polyps and took biopsies of them to test.
I'd class that as much less invasive than them having to cut in and take a biopsy that way.