egd stands for what
Esophagogastroduodenoscopy (EGD) or oesophagogastroduodenoscopy (EGD or OGD) is also called panendoscopy (PES) and upper GI endoscopy. It is also often called just upper endoscopy, upper GI, or even just endoscopy; because EGD is the most commonly performed type of endoscopy, the ambiguous term endoscopy is sometimes informally used to refer to EGD by default.