Upper GI endoscopy (with biopsy, with foreign body removal, with fulguration of bleeder (cautery vs. laser), with injection of varices) ERCP (endoscopic retrograde cholangiopancreatography) (Diagnostic, Therapeutic, With PEG (percutaneous endoscopic gastrostomy Small Bowel biopsy Lower GI endoscopy (Sigmoidoscopy (Flexible, Rigid), Colonoscopy (with biopsy, with excision of polyp Insertion/management of Sengstaken/Blakemore tube