Tarrytown

Researchers are conducting the FLEX Registry to study patients with stage I to III breast cancer who receive MammaPrint and BluePrint testing on a primary breast tumor. This large-scale, population-based, prospective registry aims to create a comprehensive database of full genome expression linked with clinical data to explore new gene associations that may have prognostic or predictive value. The registry uses an adaptive design, allowing additional targeted substudies and arms to be added over time. The study involves patients from over 125 U.S. institutions, with an anticipated enrollment of around 30,000 participants. Treatment decisions are made by physicians following NCCN-approved regimens or recognized alternatives. MammaPrint and BluePrint tests are performed by Agendia using the full genome testing array. Data collection occurs at enrollment, during treatment, and at follow-up intervals of 1, 3, 5, and 10 years after diagnosis. Participants will have clinical data entered online at specified time points, with the goal of generating hypotheses for targeted subset analyses and further trials based on the genetic data collected. Outcome measures include the creation of a large registry for gene expression and clinical data over 10 years and the development of shared registry infrastructure to study smaller patient groups. This is an observational phase IV study focused on long-term data gathering and analysis.