| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Einhorn string test | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Entero string test | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Radionuclide small intestine permeability study | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Gastrointestinal radionuclide studies | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Colloid study for bleeding | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 2 | 
| Protein-losing enteropathy study using radiolabeled chromium chloride | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 2 | 
| Fiberoptic colonoscopy with biopsy | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 3 | 
| Small intestine endoscopy | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Gastric fluid analysis, food, forensic | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Allergy to egg protein | Finding site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier |  | 
| Radiographic procedure on gastrointestinal tract | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 10 | 
| Esophagus acid perfusion test (Bernstein) | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 4 | 
| Nuclear medicine diagnostic procedure on gastrointestinal system | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 2 | 
| Fiberoptic esophagoscopy and insertion of tube prosthesis | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 3 | 
| Diagnostic fiberoptic endoscopic examination of esophagus NOS | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 3 | 
| Rigid esophagoscopy and insertion of tube prosthesis | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 3 | 
| Diagnostic endoscopic examination of lower bowel using fiberoptic sigmoidoscope NOS | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 3 | 
| Diagnostic endoscopic examination of sigmoid colon using rigid sigmoidoscope | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 3 | 
| Diagnostic endoscopic examination of sigmoid colon using rigid sigmoidoscope NOS | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 3 | 
| Kaposi's sarcoma of gastrointestinal tract | Finding site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Cleaning area around nasogastric tube | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier |  | 
| Replacing strapping on nasogastric tube | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier |  | 
| Spigotting of nasogastric tube | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier |  | 
| Checking position of nasogastric tube | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 2 | 
| Induction of vomiting | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier |  | 
| Collection of stool specimen | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Duodenal ulcer with hemorrhage | Finding site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 2 | 
| Gastroscopy - direct | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 3 | 
| Operative enteroscopy | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 3 | 
| Gastroscopy to remove object | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 3 | 
| Diagnostic endoscopic examination of colon using fiberoptic sigmoidoscope | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 3 | 
| Acute gastrointestinal hemorrhage | Finding site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Gastrojejunal ulcer without hemorrhage AND without perforation | Finding site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Chronic gastrojejunal ulcer with perforation | Finding site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Chronic gastrojejunal ulcer with perforation | Finding site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 4 | 
| Nervous diarrhea | Finding site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier |  | 
| Enteroscopy via paracentesis | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 3 | 
| Acute peptic ulcer with hemorrhage, with perforation AND with obstruction | Finding site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 16 | 
| Acute peptic ulcer with hemorrhage, with perforation AND with obstruction | Finding site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 2 | 
| Melena | Finding site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Proctosigmoidoscopy by transabdominal approach | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 3 | 
| Therapeutic fiberoptic esophagoscopy | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 3 | 
| Endoscopic biopsy of lesion of colon | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 3 | 
| Diagnostic rigid esophagoscopy | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 3 | 
| Fiberoptic sigmoidoscopy NEC | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 3 | 
| Therapeutic colonoscopy | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 3 | 
| Acute gastrojejunal ulcer without hemorrhage AND without perforation | Finding site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Acute gastrojejunal ulcer without hemorrhage AND without perforation | Finding site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 2 | 
| Acute gastrojejunal ulcer without hemorrhage AND without perforation | Finding site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 4 | 
| Gastroscopy through artificial stoma | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 3 | 
| Check colonoscopy | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 3 | 
| Intraoperative sigmoidoscopy | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 3 | 
| Chronic duodenal ulcer with hemorrhage AND obstruction | Finding site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 2 | 
| Intraoperative colonoscopy | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 3 | 
| Gastrojejunal ulcer without hemorrhage, without perforation AND without obstruction | Finding site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 2 | 
| Gastrojejunal ulcer without hemorrhage, without perforation AND without obstruction | Finding site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 2 | 
| Gastrojejunal ulcer without hemorrhage, without perforation AND without obstruction | Finding site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 4 | 
| Duodenal ulcer with hemorrhage but without obstruction | Finding site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 2 | 
| Fiberoptic colonoscopy | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 3 | 
| Diagnostic flexible fiberoptic esophagoscopy | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 3 | 
| Small intestinal endoscopy with biopsy | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 3 | 
| Chronic gastrojejunal ulcer without hemorrhage, without perforation AND without obstruction | Finding site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 2 | 
| Chronic gastrojejunal ulcer without hemorrhage, without perforation AND without obstruction | Finding site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 2 | 
| Chronic gastrojejunal ulcer without hemorrhage, without perforation AND without obstruction | Finding site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 4 | 
| Chronic gastrojejunal ulcer without hemorrhage AND without perforation | Finding site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 2 | 
| Chronic gastrojejunal ulcer without hemorrhage AND without perforation | Finding site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 2 | 
| Chronic gastrojejunal ulcer without hemorrhage AND without perforation | Finding site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 4 | 
| Gastrojejunal ulcer with hemorrhage AND obstruction | Finding site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Gastrojejunal ulcer with hemorrhage AND obstruction | Finding site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 4 | 
| Acute peptic ulcer with hemorrhage AND obstruction | Finding site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 16 | 
| Acute peptic ulcer with hemorrhage AND obstruction | Finding site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 2 | 
| Tubeless gastric analysis and measurement | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Fiberoptic esophagoscopy | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 3 | 
| Rigid esophagoscopy | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 3 | 
| Special endoscopic procedures | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Endoscopic Congo Red Test | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Endoscopic lavage of gastrointestinal tract | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Endoscopic brushings of gastrointestinal tract | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Endoscopic localization of lesion of gastrointestinal tract | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Proctosigmoidoscopy through artificial stoma | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 3 | 
| Flexible fiberoptic sigmoidoscopy | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 3 | 
| Manual procedures on the intestine | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Manual evacuation of feces from colostomy | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Manual evacuation of ileostomy | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Manual dilatation of stoma | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Gastrointestinal tract tube procedure | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier |  | 
| Intubation of gastrointestinal tract | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Intubation of gastrointestinal tract via nose | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Insertion of nasoesophageal tube | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Insertion of nasoduodenal tube | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Insertion of nasojejunal tube | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Intubation of gastrointestinal tract via mouth | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Insertion of orogastric tube | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Intubation of gastrointestinal tract via rectum | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Intubation of gastrointestinal tract via stoma | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Intubation of gastrointestinal tract via jejunostomy | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Intubation of gastrointestinal tract via ileostomy | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Intubation of gastrointestinal tract via colostomy | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Extubation of gastrointestinal tract | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Removal of nasoesophageal tube | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 1 | 
| Removal of nasoduodenal tube | Procedure site | False | Gastrointestinal tract structure | Inferred relationship | Existential restriction modifier | 3 |