| Abbreviations | Meaning |
 | BSR | Bowel Sounds Regular |
| SIS | Small Intestinal Submucosa (hernia Repair) |
| GA | Gastric Analysis |
| GF | Gastric Fistula |
| GITSG | Gastrointestinal Tumor Study Group |
| GIST | Gastrointestinal Stromal Tumor |
| PCI | Pneumatosis Cystoides Intestinales |
| GIB | Gastrointestinal Bleeding |
| POLIP | Polyneuropathy-ophthalmoplegia-leukoencephalopathy- Intestinal Pseudoobstruction [syndrome] |
| IBF | Immature Brown Fat; Immunoglobulin-binding Factor; Insall-Burstein-Freeman [total Knee Instrumentation]; Intestinal Blood Flow |
| GI | [gaster (Greek)] Gastrointestinal |
| SIM | Specialized Intestinal Metaplasia |
| CIIPX | [X-linked] Chronic Idiopathic Intestinal Pseudo-obstruction |
| GE | Gastrointestinal Endoscopy |
| MSB | Master Of Science In Bacteriology; Mid-small Bowel; Most Significant Bit |
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