Colonoscopy, Ablation therapy, Upper endoscopy, Endoscopic mucosal resection, Esophageal manometry, pH testing, Bravo c...apsule pH test, Impedance pH testing, Breath testing, Anorectal manometry, GI motility test, Esophageal dilation, Colon cancer, Polyp, Colonic dysmotility, Gastrointestinal perforation, Gastrointestinal varices, Gastroesophageal reflux disease, Dysphagia, Esophageal cancer, Barrett's esophagus, Esophagitis, Esophageal foreign body , Gastroparesis, Gastrointestinal disorder, Achalasia, Constipation, Indigestion, Esophageal spasms, Gastrointestinal bleeding, Esophageal stricture, Pelvic floor dysfunction, Chronic gastrointestinal bleeding, Radiation proctopathy