KRAS and lung adenocarcinoma: Driver genetic alterations in lung adenocarcinoma include rearrangements of ALK, RET, ROS1, NTKR1, NRG2, ERBB4, and BRAF and mutations of EGFR, KRAS, BRAF, ERBB2, NRAS, HRAS, MAP2K1, NF1, and RIT1 [3,48,49,50,51,52].