Table 1. Patient characteristics.
| 1. General patient characteristics | |
| Median age in years (range) | 61,3 (43,5–79,3) |
| Sex | |
| Female | 11 (38%) |
| Male | 18 (62%) |
| 2. Characteristics of the primary tumor | |
| Location | |
| Colon | 15 (52%) |
| Rectum | 14 (48%) |
| UICC stage | |
| I | 3 (10%) |
| II | 7 (24%) |
| III | 7 (24%) |
| IV | 12 (41%) |
| pT classification (UICC 2009) | |
| pT2 | 6 (21%) |
| pT3 | 20 (69%) |
| pT4a | 2 (7%) |
| pT4b | 1 (3%) |
| pN classification | |
| pN0 | 15 (52%) |
| pN+ | 14 (48%) |
| Grading | |
| G1 | 1 |
| G2 | 20 |
| G3 | 8 |
| Histological classification | |
| Adenocarcinoma | 27 (93%) |
| Mucinous adenocarcinoma | 1 (3%) |
| Undifferentiated carcinoma | 1 (3%) |
| Lymphatic invasion (known for n = 28 patients) | |
| yes | 16 |
| no | 12 |
| Venous invasion (known for n = 28 patients) | |
| yes | 2 |
| no | 26 |
| Perineural invasion (known for n = 26 patients) | |
| yes | 7 |
| no | 19 |
| 3. Characteristics of liver metastasis | |
| Time of diagnosis | |
| Synchronous liver metastasis | 12 (41%) |
| Metachronous liver metastasis | 17 (59%) |
| Grading of liver metastasis | |
| G2 | 25 (86%) |
| G3 | 4 (14%) |
Percentages not adding up to 100% are due to rounding.