• A meta-analysis of eight clinical trials demonstrates that CDK4/6 inhibitors combined with endocrine therapy significantly prolong progression-free survival in advanced breast cancer patients.
• The combination therapy also shows a statistically significant improvement in overall survival compared to endocrine therapy alone, with manageable adverse events.
• The study identifies a notable increase in bone marrow suppression, particularly neutropenia and leukopenia, associated with the combined treatment, but without increased gastrointestinal toxicity.
• Findings support the use of CDK4/6 inhibitors with endocrine therapy as a salvage treatment, highlighting the need for longer follow-up to fully evaluate long-term overall survival benefits.