RecruitingPhase 2Drug trialStudy of the CDK4/6 Inhibitor Abemaciclib in Solid Tumors Harboring Genetic Alterations in Genes Encoding D-Type Cyclins or Amplification of CDK4 or CDK6This research study is studying a targeted therapy as a possible treatment for cancer abnormality in one of the following genes: CCND1, CCND2, CCND3, CDK4, or CDK6. The drug involved in this study is: -Abemaciclib