By: Ashling Wahner
Key Takeaways Accelerated approval covers HR-positive/HER2-negative advanced disease with acquired ESR1 mutation on prior aromatase inhibitor plus CDK4/6 inhibition, requiring identification by an FDA-approved companion diagnostic test. Clinical evidence derives from switching to oral camizestrant plus continued CDK4/6 inhibition versus maintaining aromatase inhibitor plus CDK4/6 inhibitor, demonstrating median PFS improvement (16.0 vs 9.2 months). The regimen positions camizestrant as an ESR1-resistance–directed endocrine backbone while preserving CDK4/6 blockade, aligning with a targeted approach to endocrine escape in metastatic disease. SHOW MORE