As a result, the univariable analysis indicated that age (< 65 vs. ≥65), tumor size (≤2 cm vs. > 2 cm), T classification (T1 vs. T2 vs. T3 vs. T4), lymph node metastasis (absent vs. present), distant metastasis (absent vs. present), histological differentiation (well vs. moderate/poor) and expression of RPL15 (low vs. high) were significant prognostic factors for overall survival prediction (Table 3, Figure 3A). Here, RPL15 is linked to neoplasm.