The primary distinction between endoscopy and enteroscopy is the parts of the digestive tract they inspect. Both procedures utilize a flexible tube with a camera (endoscope), but endoscopy typically focuses on the upper gastrointestinal tract, including the esophagus, stomach, and duodenum. In contrast, enteroscopy targets the small intestine, which is located deeper within the digestive system and is more challenging to reach. Enteroscopy is often chosen when other diagnostic tests like endoscopy or colonoscopy have not provided clear results or when there is a suspected issue in the small intestine.