# Endoscopy --- **Endoscopy** **Esophagogastroduodenoscopy**, most often abbreviated to **EGD** or simply referred to as an **upper endoscopy** is a diagnostic test for conditions related to the [[gastrointestinal tract|upper GI tract]]. The endoscope is inserted into the mouth and can go all they way down to the stomach. It can even be used to take a [[biopsy]]. ![[EGD.png]] ## Conditions - [[esophageal cancer]] - [[GERD]] - [[hiatal hernia]] ___