One of the most significant advances towards personalised care in the field of oncology was the establishment of KRAS gene mutation as a validated biomarker predicting efficacy in epidermal growth factor receptor (EGFR) targeted therapies – such as cetuximab and panitumumab - in the treatment of metastatic colorectal cancer (mCRC) [2,3]. Here, KRAS is linked to metastatic colorectal cancer.