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- W4310980443 abstract "Our understanding of the biologic heterogeneity of endometrial cancer has improved, but which patients benefit from single-agent versus combination immune checkpoint blockade remains unclear.We conducted a single-center, randomized, open-label, phase 2 study of durvalumab 1500 mg (Arm 1) versus durvalumab 1500 mg plus tremelimumab 75 mg every 4 weeks (Arm 2) in patients with endometrial carcinoma. The primary endpoints were overall response rate (ORR) and progression-free survival (PFS) at 24 weeks. Patients were stratified by mismatch repair (MMR) status and carcinosarcoma histology. Using a Simon two-stage minimax design, we determined 40 patients per arm would provide 90% power and Type 1 error of 10%.Eighty-two patients were enrolled; 77 were evaluable for toxicity (Arm 1: 38, Arm 2: 39) and 75 evaluable for efficacy (Arm 1: 37, Arm 2: 38). Patient were stratified by MMR status (Arm 1: 5, Arm 2: 4 were MMR-deficient). The ORR in Arm 1 was 10.8% (one-sided 90% CI: 4.8-100%); the ORR in Arm 2 was 5.3% (one-sided 90% CI: 1.4-100%). Since the primary endpoint of ORR was not met, 24-week PFS was not compared to historical controls per protocol specification. No new safety signals were identified.In these patients with predominantly MMR-proficient endometrial cancer, there was limited response with single-agent and combined immune checkpoint blockade. The pre-specified efficacy thresholds were not met for further evaluation. A deeper understanding of potential mechanisms of resistance to immunotherapy in MMR-proficient endometrial cancer is needed for the development of novel therapeutic approaches." @default.
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- W4310980443 date "2023-02-01" @default.
- W4310980443 modified "2023-09-23" @default.
- W4310980443 title "Durvalumab with or without tremelimumab in patients with persistent or recurrent endometrial cancer or endometrial carcinosarcoma: A randomized open-label phase 2 study" @default.
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- W4310980443 doi "https://doi.org/10.1016/j.ygyno.2022.11.028" @default.
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