ROSALINE Trial: Neoadjuvant Letrozole/Entrectinib Shows Limited Efficacy in Invasive Lobular Breast Cancer
- The phase 2 ROSALINE trial found that combining entrectinib with letrozole failed to meet its primary endpoint, with no efficacy-evaluable patients achieving residual cancer burden (RCB) of 0 or 1 in invasive lobular breast cancer.
- Despite the primary endpoint failure, the treatment showed a 49% objective response rate by MRI assessment, with 10% complete responses and 39% partial responses among the 41 evaluable patients.
- ROSALINE represents the first neoadjuvant endocrine therapy trial dedicated exclusively to invasive lobular breast cancer, demonstrating the feasibility of subtype-specific trials while researchers continue biomarker analyses.
Eli Lilly and Company
Posted 8/1/2015
Jules Bordet Institute
Posted 1/14/2021