This involves a small flexible tube with a light source and camera (endoscope) being placed through the mouth (usually under sedation) to assess the oesophagus, stomach and small bowel. It takes around 10 minutes but may be longer if additional procedures are undertaken. These might include taking tissue samples (biopsies) treatment for bleeding, blockages (stenting) or removing early cancer. For a full information leaflet please download the following file
adapted from the British Society of Gastroenterology