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Relay Therapeutics Announces Efficacy Subset Analysis of Zovegalisib (RLY-2608) + Fulvestrant in Breast Cancer Patients Pre-Treated with SERD or with ESR1 Mutations at SABCS 2025

Efficacy data remain consistent with previous disclosures, showing 10.3-month median PFS in all patients and 11.4-month median PFS in 2L patients Subset analyses show broad activity in patients with PI3Kα-mutated,