Study Comparing Pathological Responses Observed on Colorectal Cancer Metastases Resected After Preoperative Treatment Combining Cetuximab With FOLFOX or FOLFIRI in RAS and B-RAF WT Tumors

To analyze the pathological tumor response on resected colorectal cancer metastases after preoperative treatment with cetuximab combined with FOLFOX or FOLFIRI regimen in a prospective cohort (RAS and B-RAF WT tumors) and to correlate this response with patient’s outcome.