Osimertinib Plus Dalpiciclib in Patients With EGFR-mutant, CDK4/6 Pathway Aberrant, Advanced Non-small Cell Lung Cancer Following Acquired Resistance to Third-generation EGFR TKI: a Phase II Trial

After signing informed consents and completing the screening phase, eligible subjects who meet the enrolment criteria receive the treatment with once-daily osimertinib 80 mg plus dalpiciclib 125 mg daily for 21 consecutive days followed by 7 days off in each 28-day cycle until objective disease progression, intolerable toxicity, or other events that subjects need to be withdrawn from the study.