Endoscopy is a nonsurgical procedure that can be used to examine your digestive tract. Using an endoscope, a flexible tube with a light and camera attached to it, your doctor can view pictures of your digestive tract on a colour TV monitor. An endoscopy offers an opportunity to collect tissue samples (biopsy) to test for diseases and conditions that may be causing anaemia, bleeding, inflammation or diarrhoea. It can also detect some cancers of the upper digestive