Real-World Study on CDK4/6 Inhibitors Combined With Endocrine Therapy and Subsequent Treatment in HR+/HER2- MBC.
Status: NOT_YET_RECRUITING
Study type: OBSERVATIONAL
Conditions: Breast Cancer|Endocrine Therapy|CDK4/6 Inhibitors|Subsequent Treatment
Interventions: DRUG: Different treatment regimens following progression on CDK4/6 inhibitors.
Sponsor: Hunan Cancer Hospital