Exact Sciences Corp. (NASDAQ: EXAS), a global leader in cancer diagnostics, announced today that it has entered a collaboration agreement with the West German Study Group (WSG), an international research institution that focuses on practice-changing clinical studies in breast cancer. Together, Exact Sciences and WSG plan to conduct a prospective, multicenter validation study in hormone receptor (HR)-positive, HER2-negative early breast cancer patients. The study is intended to demonstrate the ability of Exact Sciences’ tumor-informed ctDNA liquid biopsy test to detect minimal residual disease (MRD) and to collect important long-term follow-up and outcome data.

The combined analysis, called ADAPT Triad, is expected to include data from approximately 3,000 German patients enrolled in two ongoing WSG ADAPT trials and one WSG registry study. All patients included in the analysis are stratified using the Oncotype DX Breast Recurrence Score® test. The study is part of Exact Sciences’ global initiative to generate clinical validation data for its tumor-informed ctDNA MRD liquid biopsy test, currently in development.

“This ADAPT Triad project with WSG offers a tremendous opportunity to help inform treatment decisions and recurrence monitoring, and ultimately improve future outcomes for breast cancer patients,” said Rick Baehner, MD, chief medical officer of Precision Oncology for Exact Sciences. “In addition to helping validate our MRD assay, we’re also eager to better understand the potential synergies involving the predictive and prognostic information provided by our Oncotype DX Breast Recurrence Score® test. WSG’s expertise in breast cancer research makes them ideal collaborators to conduct these important MRD studies in HR positive, HER2-negative early breast cancer.”

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