| Abbreviations | Meaning |
 | GP | Gastric Pneumatosis |
| GDA | Gastroduodenal Artery; General Daily Activity; Germine Diacetate; Graves Disease Autoantigen |
| CIA | Chemiluminescent Immunoassay; Chymotrypsin Inhibitor Activity; Colony-inhibiting Activity; Congenital Intestinal Aganglionosis |
| DGR | Duodenogastric Reflux |
| UGIB | Upper Gastrointestinal Biopsy |
| NG | Nasogastric; Neisseria Gonorrhoeae; Neoplastic Growth; New Growth; Nitroglycerin; Nodose Ganglion; No Growth; Not Given |
| GV | Gastric Volume |
| LB | Large Bowel |
| HIPO | Hemihypertrophy, Intestinal Web, Preauricular Skin Tag, And Congenital Corneal Opacity [syndrome]; Hospital Indicator For Physicians Orders |
| VIP | Vasoactive Intestinal Peptide |
| INT | Interference; Intermediate; Intermittent; Intern, Internship; Internal; Interval; Intestinal; Intima; P-iodonitrotetrazolium |
| INT | International; Intestinal |
| CIIP | Chronic Idiopathic Intestinal Pseudoobstruction |
| INN | International Nonproprietary Names; Intestinal Noise |
| GAS | Gastroenterology |
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