Age

18–any

Sex

ALL

Healthy volunteers

Not accepted

Patients eligible for radical liver resection without formal liver resection or without assistance of radiofrequency ablation

Inability to give written informed concent
Patients with tumors that can't be resected without reconstruction of vessels or bile ducts
Patients with tumors that can't be resected without 1)formal liver resection 2)combination with radiofrequency ablation
Patients with extrahepatic metastasis except resectable metastasis in lungs and adrenals
Pre- and peroperative diagnosis of non radically treatable disease

Oslo Randomized Laparoscopic Versus Open Liver Resection for Colorectal Metastases Study