Abstract
The white blood cell (WBC) indices have been reported to have a prognostic impact in cancer of multiple organs including head and neck cancer; however; site and stage stratification was not attempted, and compelling evidence has shown that early cancers have a different distribution and prognostic ability than late-stage cancers. We studied the prognostic importance of WBC indices in early oral tongue cancers. The retrospective data of primary pT1N0 to pT2N0 oral tongue cancers treated between 2009 and 2013 were charted. WBC indices such as the neutrophil count, lymphocyte count (LC), platelet count (PC), and monocyte count, along with derived indices such as the neutrophil-lymphocyte ratio, platelet-lymphocyte ratio (PLR), and lymphocyte-monocyte ratio (LMR), were analyzed by multivariate analysis with other clinicopathologic prognostic factors. A total of 133 patients fulfilled the inclusion criteria; the minimum follow-up period for living patients was 36months. A total of 22 patients reported disease relapse, and 11 patients died of disease. Multivariate analysis showed LC (hazard ratio [HR], 0.206; 95% confidence interval [CI], 0.092 to 0.46; P < .001), PC (HR, 1.011; 95% CI, 1.001 to 1.021; P= .026), PLR (HR, 1.012; 95% CI, 1.008 to 1.016; P < .001), and LMR (HR, 0.721; 95% CI, 0.596 to 0.872; P= .001) are significant independent prognostic factors for disease-free survival. Distant metastasis (HR, 9.014; 95% CI, 2.303 to 38.914; P= .004), LC (HR,0.091; 95% CI, 0.015 to 0.558; P= .01), PC (HR, 1.023; 95% CI, 1.006 to 1.041; P= .009), PLR (HR, 1.016; 95% CI, 1.004 to 1.027; P= .002), and LMR (HR, 0.58; 95% CI, 0.387 to 0.868; P= .008) are significant independent prognostic factors for overall survival. Low pretreatment LMR and high PLR indicate poor survival in patients with early tongue cancer. We suggest close follow-up for this subgroup despite radical resection with clear margins.
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