Cetuximab is approved by the European Medicines Agency (EMEA) for the treatment of patients with EGFR expressing, KRAS wild-type metastatic colorectal cancer (in combination with chemotherapy as well as single-agent-therapy in patients who have failed oxaliplatin- and irinotecan-based therapy and who are intolerant to irinotecan). This evidence concerns the gene EGFR and metastatic colorectal cancer.