PROSPECT-C: A Study of Biomarkers of Response or Resistance to Anti-EGFR Therapies in Metastatic Colorectal Cancer

Cetuximab or panitumumab are two monoclonal antibodies that are routinely offered to patients with metastatic colorectal cancer when they have no mutation in RAS genes. In Royal Marsden Hospital patients, who are refractory to all standard therapies and have metastatic colorectal cancer are offered one of these agents in third line metastatic setting. Whilst the mechanisms of response/resistance to these therapies are well studies, they are still incompletely understood. The main hypothesis of this study is that finding mechanisms of response and/or resistance by using novel techniques such as next generation sequencing (NGS) and/or digital droplet polymerase chain reaction (ddPCR) to these therapies will allow better patient selection and application of precision medicine in such patients.