 Patients, who underwent liver resection due to colorectal liver metastases after neoadjuvant chemotherapy, operated between 2005 and 2007 will be evaluated retrospectively. The patients will be distributed in two groups, either with or without bevacicumab. Outcome parameters are mortality, complications, hospital stay and ICU stay. To increase the power of the study the total number of patients will be increased by adding patients from other centers. Results will be adjusted for the propensity of developing complications. 