| Abbreviations | Meaning |
 | N/G | Nasogastric |
| SIMA | Small Intestinal Mucinous Antigen |
| RBPI | Intestinal Retinol-binding Protein |
| FIPA | Familial Intestinal Polyatresia [syndrome] |
| OGJ | [o]esophagogastric Junction |
| PGC | Pregastricin; Primordial Germ Cell |
| IMC | Intestinal Mast Cell |
| GA | Gastric Antrum |
| INN | International Nonproprietary Names; Intestinal Noise |
| SBR | Small Bowel Resection; Small Box Respirator; Spleen-to-body [weight] Ratio; Strict Bed Rest; Styrene-butadiene Rubber |
| UGI | Upper Gastrointestinal [tract] |
| GITS | Gastrointestinal Therapeutic System |
| JGI | Jejunogastric Intussusception; Juxtaglomerular Granulation Index |
| SBFT | Small Bowel Follow Through Series |
| HIPO | Hemihypertrophy, Intestinal Web, Preauricular Skin Tag, And Congenital Corneal Opacity [syndrome]; Hospital Indicator For Physicians Orders |
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