nan
Predictive, Prognostic evidence:
Predictive: The study demonstrates that the presence of ESR1 mutations correlates with progression-free survival (PFS) and overall survival (OS) in patients treated with exemestane and fulvestrant, indicating that these mutations can predict treatment response. The interaction between ESR1 mutation status and treatment outcomes further supports this predictive relationship.
Prognostic: The results indicate that patients with detected ESR1 mutations have inferior PFS and OS, suggesting that these mutations are associated with worse disease outcomes independent of the specific therapy used. This correlation highlights the prognostic significance of ESR1 mutations in hormone receptor-positive metastatic breast cancer.