CURRENT MEDICAL RESEARCH AND OPINION, vol.33, no.9, pp.1559-1569, 2017 (SCI-Expanded)
Background: Resistance to endocrine treatment generally occurs over time, especially in the metastatic stage. In this paper, we aimed to review the mechanisms of cyclin-dependent kinase (CDK) 4/6 inhibition and clinical usage of new agents in the light of recent literature updates.