Preoperative independent prognostic factors in patients with borderline resectable pancreatic ductal adenocarcinoma following curative resection: the neutrophil-lymphocyte and platelet-lymphocyte ratios
The therapeutic strategy for borderline resectable pancreatic ductal adenocarcinoma (BR-PDAC) has remained unestablished because the preoperative prognostic factors have not been determined.
One hundred eighty-four consecutive PDAC patients who underwent upfront surgery with a curative resection between January 2000 and June 2013 at Kobe University Hospital were retrospectively studied. The PDAC patients were stratified into resectable (R)-PDAC (n = 147) and BR-PDAC patients (n = 37). We evaluated the independent prognostic significance of the neutrophil-lymphocyte ratio (NLR) and the platelet-lymphocyte ratio (PLR) in the BR-PDAC patients.
BR-PDAC patient survival was significantly worse than R-PDAC patient survival (median survival time: 22.1 months vs. 24.3 months; 5-year survival rate 6 vs. 21 %; P = 0.042). The median survival in BR-PDAC patients with a preoperative NLR of >3 (n = 12) was 10.2 months, while that in patients with preoperative NLR of ≤3 (n = 25) was 24.9 months (P = 0.002). Moreover, the median survival in BR-PDAC patients with a preoperative PLR of >225 (n = 8) was 10.2 months, while that in patients with a preoperative PLR of ≤225 (n = 29) was 24.7 months (P = 0.003). Preoperative NLR >3 (HR = 2.980, 95 % CI 1.251–6.920; P = 0.015) and PLR >225 (HR = 3.050, 95 % CI 1.169–7.468; P = 0.024) were independent prognostic factors in BR-PDAC patients.
Higher preoperative NLR and PLR can be independent predictive risk factors in BR-PDAC patients following curative resection.
KeywordsPancreatic ductal adenocarcinoma Borderline resectable pancreatic ductal adenocarcinoma Prognostic factor Neutrophil-lymphocyte ratio Platelet-lymphocyte ratio
We are grateful to the Department of Pathology at Kobe University Hospital for their pathological diagnoses of pancreatic adenocarcinoma. We also thank St. Luke’s Life Science Institute, Center for Clinical Epidemiology for the stimulating discussion regarding statistical analyses.
Conflict of interest
The authors declare no conflicts of interest in association with the present study.
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