부산대학교 도서관

Around 15% of metastatic endometrial carcinoma (EC) are MMRd/MSI-H improving response to immune checkpoint inhibitors (ICI). So far, few data existed considering the chemotherapy (CT) sensitivity in MMRd/MSI-H EC, especially response to first-line platinum-based treatment. We performed a multicentric retrospective analysis reporting the response to first line platinum CT in MMRd/MSI-H EC patients. The primary endpoints were objective response rate (ORR) and progression-free survival (PFS) with first line platinum-based CT. A total of 112 patients MMRd/MSI-H EC from 8 centers were identified. Median overall survival was 58.0 months (95% CI: 45.3–95.1). Among them, 78 patients received first line platinum CT in recurrent/metastatic setting. With a median follow up of 32.6 months (min: 0.03; max: 135.0), ORR and DCR (disease control rate) were 50% (95% CI: 38.5–61.5) and 68% (95% CI: 56.4–78.1), respectively. Median PFS and OS from first line platinum-based CT was 7.8 months (95% CI: 6.0–9.0) and 51.9 months (95% CI: 28.0-NE), respectively. Median PFS with ICI in second line (n = 48) was 10.7 months (95% CI: 3.4-NE) from ICI initiation. ORR in first line metastatic MMRd/MSI-H EC is consistent with efficacy in an all comer metastatic EC population. • Approximately, 30% of primary endometrial cancers are MMRd/MSI-H. • In this population, PD-1 and PDL-1 inhibitors therapy have shown response rates between 40 and 60%. • However their response to 1st line platinum is unknown. • We report that the response rate is similar to an all-comer population but PFS is shorter than expected. [ABSTRACT FROM AUTHOR]