| CAPOX | Capecitabine and Oxaliplatin |
| CEA | Carcinoembryonic Antigen |
| cCR | Clinical Complete Response |
| CI | Confidence Interval |
| cN | Clinical Nodal Stage |
| COPD | Chronic Obstructive Pulmonary Disease |
| CRM | Circumferential Resection Margin |
| CT | Computed Tomography |
| cT | Clinical Tumor Stage |
| cT4 | Clinical T4 Stage |
| DWI | Diffusion-Weighted Imaging |
| EMVI | Extramural Venous Invasion |
| FOLFOX | Fluorouracil, Leucovorin, and Oxaliplatin |
| HR | Hazard Ratio |
| IMRT | Intensity-Modulated Radiotherapy |
| IQR | Interquartile Range |
| LARC | Locally Advanced Rectal Cancer |
| LCCRT | Long-Course Chemoradiotherapy |
| mFOLFIRINOX | Modified Fluorouracil, Leucovorin, Irinotecan, and Oxaliplatin |
| MRI | Magnetic Resonance Imaging |
| MRF | Mesorectal Fascia |
| OR | Odds Ratio |
| pCR | Pathological Complete Response |
| RMST | Restricted Mean Survival Time |
| SD | Standard Deviation |
| TME | Total Mesorectal Excision |
| TNT | Total Neoadjuvant Therapy |
| VMAT | Volumetric-Modulated Arc Therapy |
| ypT0N0 | Absence of viable residual tumor in the rectal wall and regional lymph nodes (Pathological Complete Response) |