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BACKGROUND The aim of this study was to investigate the clinical and prognostic significance of pathological and inflammatory marker in mucinous rectal cancer patients receiving neoadjuvant chemoradiotherapy and curative surgery. MATERIAL AND METHODS We retrospectively evaluated the patient records of mucinous rectal cancer patients receiving neoadjuvant chemoradiotherapy and curative surgery at Liaoning Cancer Hospital and Institute from January 2006 to December 2013. The relationship between overall survival (OS) and clinicopathologic variables, pretreatment neutrophil-to-lymphocyte ratio (NLR), pretreatment platelet-to-lymphocyte ratio (PLR), pretreatment lymphocyte-to-monocyte ratio (LMR), and other biomarkers were analyzed by using Kaplan-Meier analysis and log-rank testing. Subsequently a Cox proportional hazard model was used to calculate hazard ratios for the risk of death. RESULTS A total of 100 mucinous rectal cancer patients were included for analysis during the study period. The median age at presentation was 60.5 years (range, 26-81 years). The median overall survival (OS) for the whole group was 94 months. On univariate analysis, time interval from CCRT to operation (HR 0.37, p=0.03), lymphovascular invasion (HR 3.23, p=0.009), pretreatment NLR (HR 3.87, p=0.012), and LMR (HR 0.31, p=0.002) were significant prognostic factors for OS. In a multivariate analysis, pretreatment LMR was found to be an independent prognostic factor for overall survival (HR, 0.43; 95%CI, 0.18 to 1.00, p=0.045). CONCLUSIONS Pretreatment lymphocyte-to-monocyte ratio is a useful prognostic marker of OS in patients with mucinous rectal carcinoma treated with neoadjuvant chemoradiotherapy and curative surgery.

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Clinical and Prognostic Significance of Pathological and Inflammatory Markers in Mucinous Rectal Cancer Patients Receiving Neoadjuvant Chemoradiotherapy and Curative Surgery