Wednesday, March 18, 2026
Robert LeBoyer, Senior Vice President, Equity Research Analyst, Biotechnology, Noble Capital Markets, Inc.
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New Analysis Shows Less Than 1% Recurrance Rate. Greenwich Pharmaceuticals announced a preliminary update from its FLAMINGO-01 trial. The data from the open-label arm of the trial showed a recurrence rate of less than 1% per year compared to a recurrence rate of 4% per year for patients treated with Kadcyla (ado-trastuzumab emtansine or T-DM1, from Genentech) in the Phase 3 KATHERINE Study. This is a 70% to 80% reduction in the historical recurrence rate for these patients.
Background On The Phase 3 FLAMINGO-01 Trial. The trial tests GLSI-100, an immunotherapy to prevent recurrence of HER2-positive breast cancer. Its design has a double-blind portion that enrolls patients with the immune marker HLA-A*02 to receive either GLSI-100 or placebo, and an open-label arm that enrolls patients that have other HLA types (non-HLA-A*02). The new data is from the open-label arm of the trial.
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