| | Group | Normal | Mucosal congestion | Benign papillary growth | Squamous cell carcinoma | Cancer incidence (%) | | Submucosal invasion | Muscle invasion | Serosal invasion |
| | CO () | 6 | — | — | — | — | — | 0 | | CC () | 6 | — | — | — | — | — | 0 | | MNU + s-NaCl () | — | — | — | 2 | 3 | 1 | 100 | | MNU + s-NaCl + C3W () | — | — | 2 | 2 | 1 | — | 60 | | MNU + s-NaCl + C20W () | — | 1 | 2 | 3 | — | — | 50 |
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