Abstract
As indicators of systemic inflammatory response, the neutrophil-to-lymphocyte ratio (NLR) and platelet-to-lymphocyte ratio (PLR) predict prognoses for various cancers. This study investigated their prognostic significance in extrahepatic cholangiocarcinoma (ECC). We analyzed 120 patients who underwent surgery for ECC between 2000 and 2014. We calculated preoperative NLR and PLR and evaluated their correlations with patients' clinicopathological features and prognosis. Although high NLR was not associated with worse recurrence-free survival (RFS) (hazard ratio (HR)=1.32, p=0.26), cancer-specific survival (CSS) (HR=1.35, p=0.31) and overall survival (OS) (HR=1.19, p=0.52), high PLR was significantly associated with worse RFS (HR=1.85, p=0.01), CSS (HR=2.38, p=0.002) and OS (HR=1.98, p=0.008). In multivariate analysis, high PLR (HR=1.89, p=0.02) and lymph node metastasis (HR=1.78, p=0.03) were independent prognostic factors for OS. A high PLR had more liver recurrences (p=0.04) and recurrences within 1 year (HR=2.38, p=0.02) than low PLR. High preoperative PLR was an independent predictor of poor prognosis for patients with ECC who underwent resections.
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