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- W4379338421 abstract "8582 Background: Tarlatamab, a BiTE molecule targeting DLL3 and CD3, is being studied in patients (pts) with extensive stage small cell lung cancer (ES-SCLC). 1 Up to 25% of pts diagnosed with SCLC have brain metastases (BM) and 50% or more will develop BM during the course of the disease. Pts with ES-SCLC and BM have poor prognosis and quality of life. We analyzed the characteristics and outcomes of pts included in the tarlatamab phase 1 study (NCT03319940) who had baseline BM vs those who did not. Methods: Pts included in the phase 1 trial had SCLC that progressed after ≥1 platinum-based regimen and received tarlatamab (0.003–100 mg IV). Pts with treated BM were eligible if local therapy was delivered ≥ 2 weeks prior to first tarlatamab dose. Results: As of 03 January 2023, 192 pts had received tarlatamab as monotherapy. Median age was 62 (range, 32–80) y; 188 pts (98%) had ECOG PS 0–1 and median prior therapy lines was 2 (range, 1–6), with 107 pts (56%) receiving prior anti-PD1/PD-L1. 48 pts (25%) had BM at screening and 142 (74%) did not (No BM); data was missing for 2 pts (1%). Pts with BM were more likely to have received > 3 prior lines of therapy (BM, 29%; No BM, 9%) and have a record of prior brain radiation (BM, 85%; No BM, 40%); otherwise, characteristics of pts with BM were generally similar to those without. Tarlatamab delivered comparable activity in pts with BM vs. those without in terms of objective response rate (ORR; 20%, 25%) and disease control rate (DCR; 59%, 50%) (Table). Median duration of response (DoR) was 14.9 months (BM) vs. 13.0 months (no BM). Median overall survival (OS) was 13.2 months in the BM group vs 15.5 months in the no BM group. Safety outcomes were similar in terms of treatment-related AEs (TRAEs; BM, 90%; No BM, 94%) and grade (gr) ≥ 3 (BM, 38%; No BM, 39%). Groups were also comparable with respect to immune effector cell-associated neurotoxicity syndrome (ICANS) and associated neurologic events (any-grade, 6% vs 9%; gr ≥ 3, 4% vs 4%) and neutropenia (any-grade, 10% vs 15%; gr ≥ 3, 8% vs 8%). AEs numerically different in the BM vs No BM group included gr ≥ 4 TRAEs (17%, 7%) and any-grade CRS (67%, 54%). The only grade 5 TRAE (pneumonitis) occurred in the BM group. Conclusions: Tarlatamab continues to show promising efficacy and is generally safe in pts with ES SCLC irrespective of the presence of BM. Rates of ICANS and associated neurologic AEs were comparable between those with and without BM at baseline. Reference: 1. Paz-Ares L, et al. J Clin Oncol. DOI:10.1200/JCO.22.02823. Clinical trial information: NCT03319940 . [Table: see text]" @default.
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- W4379338421 date "2023-06-01" @default.
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- W4379338421 title "Tarlatamab in small cell lung cancer (SCLC): Safety and efficacy analyzed by baseline brain metastasis." @default.
- W4379338421 doi "https://doi.org/10.1200/jco.2023.41.16_suppl.8582" @default.
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