| Unfavourable | Favourable |
|---|---|
| Complete disruption | Continuity maintained |
| Lateral fistula | End fistula |
| Large adjacent abscess | No associated abscess |
| Adjacent bowel diseased | Adjacent bowel healthy |
| Distal obstruction | Free distal flow |
| Fistula tract h2 cm — epithelialisation | Fistula tract g2 cm — non-epithelialised |
| Enteral defect g1 cm | Enteral defect h1 cm |
| Fistula site: | Fistula site: |
| • Gastric | • Oropharyngeal |
| • Lateral duodenal | • Oesophageal |
| • Ligament of Treitz | • Duodenal stump |
| • Ileal | • Pancreatobiliary |
| • Jejunal |