esophagogastroduodenoscopy. medical diagnostics of the esophageal, stomach

medicine endoscopic digestive science anatomy medical health gastric stomach vector gastrointestinal duodenum endoscopy cancer examination diagnostic esophagogastroduodenoscopy digestion endoscope esophagus gastroenterologist organ treatment system gastroscopy procedure disease care healthy upper icon gastroscope gastroenterology gastritis ulcer human egd healthcare tissue test body infection mucosa inflammation light intestine peptic gut esophageal tract