ArticleClinical & translational oncology : official publication of the Federation of Spanish Oncology Societies and of the National Cancer Institute of Mexico2026
Combined positive score status in metastatic triple-negative breast cancer patients treated with sacituzumab govitecan: associated clinical characteristics and testing patterns in a Central European cohort.
Article in Clinical & translational oncology : official publication of the Federation of Spanish Oncology Societies and of the National Cancer Institute of Mexico, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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- Impact of GermlineOncology research · 2026Article
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Abstract
backgroundProgrammed death ligand 1 (PD-L1) expression, assessed by the combined positive score (CPS), is an established predictive biomarker for first-line chemo-immunotherapy in metastatic triple-negative breast cancer (mTNBC). In routine practice, CPS testing is heterogeneous and its relationship with outcomes in later-line, sacituzumab govitecan (SG)-treated patients with mTNBC is not well described. We aimed to assess clinicopathological correlates of CPS and its association with survival in this cohort.
methodsWe conducted a retrospective, multicenter study within the Central European Breast Cancer Collaboration (CEBCC)-102 project. CPS was locally assessed by validated immunohistochemistry. Survival outcomes: overall survival (OS), post-metastatic survival (PMS), and metastasis-free interval, were assessed with the Kaplan-Meier method.
resultsOf 303 women from the Czech Republic, Poland, and Slovakia with mTNBC treated with SG in ≥ 2 line, 107 (35.3%) with available CPS results were included in this analysis. CPS was positive (≥ 10) in 51/107 patients (47.7%) without significant demographic or disease-specific differences. During a median follow-up of 40 months, CPS-positive status may suggest worse outcomes in this cohort in multivariate analysis despite partial first-line chemo-immunotherapy exposure: OS 41.6 versus 67.7 months (HR 2.2, 95% CI: 1.1-4.5, p = 0.027) and PMS 20.2 versus 27.1 months (HR = 2.3, 95% CI: 1.2-4.2, p = 0.009).
conclusionsIn this selected cohort, CPS status did not correlate with clinicopathological characteristics, but CPS-positive status was associated with inferior survival outcomes. Given the selection and survivor bias inherent to later-line treatment cohorts and the incomplete availability of CPS, these findings should be considered hypothesis-generating.
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