| NEN | Neuroendocrine neoplasm |
| rNEN | Rectal neuroendocrine neoplasm |
| NET | Neuroendocrine tumor |
| rNET | Rectal neuroendocrine tumor |
| NEC | Neuroendocrine carcinoma |
| rNEC | Rectal neuroendocrine carcinoma |
| MiNEN | Mixed neuroendocrine–non-neuroendocrine neoplasm |
| PFS | Progression-free survival |
| OS | Overall survival |
| AJCC | American Joint Committee on Cancer |
| PRRT | Peptide receptor radionuclide therapy |
| HR | Hazard ration |
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