ALK and lung adenocarcinoma: Mutational profiling of 200 lung adenocarcinomas in Korean patients identified mutations of EGFR in 60.5%, KRAS in 12%, and translocations in anaplastic lymphoma kinase (ALK), c-ros oncogene 1 (ROS1), and RET proto-oncogene (RET) in 8.5% of cases [42].