ROS1 and non-small cell lung carcinoma: Since she has a nonsquamous NSCLC, she should be tested, at minimum, for epidermal growth factor receptor (EGFR), anaplastic leukemia kinase (ALK), ROS proto-oncogene 1 (ROS1), and programmed cell death ligand 1 (PD-L1; National Comprehensive Cancer Network [NCCN], 2016).