Transnasal endoscopy: Savior for patients with endoscopy phobia

Ever since the introduction of esophagogastroduodenoscopy, it has become the first line of diagnostic and therapeutic tool of gastrointestinal diseases. However, patients' discomfort and fear often result in failure of examination. As technique has advanced, the diameter of the esophagogastroduodenoscopy has decreased significantly. Therefore, ultrathin transnasal esophagogastroduodenoscopy has been widely used in many countries. Its main advantages are better tolerance and safety. This article will review recent studies and advancements in transnasal esophagogastroduodenoscopy.