“…During the last decade, NSCLC treatment has increasingly depended on molecular profiling given the introduction of small molecule kinase inhibitors (SMKIs) targeting activating mutations in EGFR, ALK, BRAF, RET, MET, NTRK and ROS1 oncogenes and with additional molecular targets pending approval [15]. While only around a third of patients harbour these mutations, the most frequent oncogenic driver in NSCLC is the Kirsten rat sarcoma viral oncogene (KRAS) present in up to 40% of all cases, with the most common mutations being G12C, G12V and G12D [16]. KRAS mutations have been associated with a worse outcome, both when treated with chemotherapy and radiotherapy, with shorter OS in stage III and IV patients [17][18][19][20][21][22][23][24].…”