| Abbreviations | Meaning |
 | GD | Gastroparesis Diabeticorum |
| GIA | Gastrointestinal Anastomosis |
| EGCS | Early Gastric Carcinomas |
| UGIS | Upper Gastrointestinal Series |
| SBR | Small Bowel Resection; Small Box Respirator; Spleen-to-body [weight] Ratio; Strict Bed Rest; Styrene-butadiene Rubber |
| INT | Interference; Intermediate; Intermittent; Intern, Internship; Internal; Interval; Intestinal; Intima; P-iodonitrotetrazolium |
| IVR | Intestinal Vascular Resistance |
| JGI | Jejunogastric Intussusception; Juxtaglomerular Granulation Index |
| GIST | Gastrointestinal Stromal Tumor |
| URG | Urogastrone |
| GO | Gastro-[o]esophageal; Geroderma Osteodysplastica; Glutamic Oxylacetic [acid]; Gonorrhea; Glucose Oxidase |
| PCI | Pneumatosis Cystoides Intestinales |
| UG | Geometric Unsharpness; Urogastrone; Urogenital |
| GER | Gas Exchange Region; Gastroesophageal Reflux; Geriatrics; Granular Endoplasmic Reticulum |
| LI | Large Intestine |
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