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Perforated diverticulitis computed tomography grading system16
| Grade | Definition |
|---|---|
| 1 | Localised free air (pericolonic) without abscess |
| 2 | Small (<2cm) collections of distant free air OR small (<4cm) abscess |
| 3 | Large (>2cm) collections of distant free air OR large (>4cm) abscess |
| 4 | Free air with non-loculated free fluid in the peritoneal cavity |
