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| Evaluation item | cCR criteria |
| cCR, clinical complete response; MRI, magnetic resonance imaging; CEA, carcinoembryonic antigen. | |
| Digital rectal examination | No clear mass was observed, and the intestinal wall was soft |
| Endoscopy | No clear residual tumor was observed, and only leukoplakia and/or telangiectasia could be seen in the original tumor area |
| Pelvic cavity MRI | No residual tumors or lymph nodes were observed, only fibrosis was observed |
| Blood CEA level | Normal |
