Axitinib Monotherapy With Early Dynamic Contrast Enhanced Ultrasound Monitoring in Chemorefractory Third Line Metastatic Colorectal Cancer

This is a study of Axitinib versus placebo as monotherapy for people with colorectal cancer who have liver metastases and who have relapsed within 6 months of their last chemotherapy regime. The research will also look at the potential of CEHPI (Contrast Enhanced Hepatic Perfusion Index) reduction, a technique developed for this research to measure the changes in how the blood vessels pump blood into the different liver metastases (tumours) and therefore to assess and predict response to treatment.