| GEP-NENs | Gastro-Entero-Pancreatic Neuroendocrine Neoplasms |
| GEP-NETs | Gastro-Entero-Pancreatic Neuroendocrine Tumors |
| GEP-NECs | Gastro-Entero-Pancreatic Neuroendocrine Carcinomas |
| WHO | World Health Organization |
| HOX | Homeobox |
| LncRNAs | Long non coding RNAs |
| HOTAIR | Hox transcript antisense intergenic RNA |
| NENs | Neuroendocrine neoplasms |
| CRC | Colorectal cancer |
| ISH | In Situ Hybridization |