[Peroperative ultrasonography in surgery of liver metastases in colorectal cancer. A obligatory examination].

It is not easy to evaluate the real actual benefit of resection of liver metastases from colo/rectal carcinoma. This is partly due to inaccurate preoperative imaging of the metastases. The given sensitivity of the various imaging techniques varies widely. Peroperative ultrasonography is more sensitive than the other techniques. It will influence the operation for metastases in 15-40% of the cases. This technique should therefore be compulsory in connection with surgery for liver metastases.