- Patients who have not given informed consent or who have withdrawn their consent will be excluded from this analysis. In case there is not enough liver tissue for a histological analysis or the remaining liver tissue is not enough to perform a routine pathological analysis patients have to be excluded from the further analysis. In case of an R1 or R2 resection, patients have to be excluded from further analysis. However, these patients will remain in the study as an intention to treat analysis.