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Preoperative Rectal Stratification Score (PReSS) for lymph node positivity
| <1cm (0 points) | 1–1.99 cm (1 point) | ≥2 cm (1 point) | |
|---|---|---|---|
| Submucosa (0 points) | 13% (0 points) | 42% (1 point) | 33% (1 point) |
| Muscularis propria (1 point) | 36% (1 point) | 54% (2 points) | 50% (2 points) |
| Through muscularis propria (2 points) | N/A | 80% (3 points) | 83% (3 points) |
| Adjacent organs (2 points) | N/A | N/A | 70% (3 points) |
