RT Journal Article SR Electronic T1 Tyrosine Kinase Inhibitor Therapy for Brain Metastases in Non-Small-Cell Lung Cancer: A Primer for Radiologists JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 738 OP 750 DO 10.3174/ajnr.A6477 VO 41 IS 5 A1 C. Dodson A1 T.J. Richards A1 D.A. Smith A1 N.H. Ramaiya YR 2020 UL http://www.ajnr.org/content/41/5/738.abstract AB SUMMARY: Treatment options for patients who develop brain metastases secondary to non-small-cell lung cancer have rapidly expanded in recent years. As a key adjunct to surgical and radiation therapy options, systemic therapies are now a critical component of the oncologic management of metastatic CNS disease in many patients with non-small-cell lung cancer. The aim of this review article was to provide a guide for radiologists, outlining the role of systemic therapies in metastatic non-small-cell lung cancer, with a focus on tyrosine kinase inhibitors. The critical role of the blood-brain barrier in the development of systemic therapies will be described. The final sections of this review will provide an overview of current imaging-based guidelines for therapy response. The utility of the Response Assessment in Neuro-Oncology criteria will be discussed, with a focus on how to use the response criteria in the assessment of patients treated with systemic and traditional therapies.ALKanaplastic lymphoma kinaseCTLA-4cytotoxic T-lymphocyte-associated protein 4EGFRepidermal growth factor receptorEML4echinoderm microtubule-associated protein-like 4ICIimmune checkpoint inhibitorNSCLCnon-small-cell lung cancerPD-1programmed cell death protein 1PFSprogression-free survivalPRESposterior reversible encephalopathy syndromeQALYquality-adjusted life yearsRANOResponse Assessment in Neuro-OncologyRECISTResponse Evaluation Criteria in Solid TumorsROS1C-ras oncogene 1SRSstereotactic radiosurgeryTKItyrosine kinase inhibitorWBRTwhole-brain radiation therapy