| CK-20 | Cytokeratin-20 |
| CRC | Colorectal cancer |
| CTC | Circulating tumour cells |
| EGFR | Epithelial Growth Factor Receptor |
| EMT | Epithelial-Mesenchymal-Transition |
| EpCAM | Epithelial adhesion molecule |
| EU | expression units |
| pan-CK | pan-Cytokeratin |
| RT-qPCR | Real Time quantitative Polymerase Chain Reaction |
| UICC | Union internationale contre le cancer |