According to the results of correlation analysis of DDX31 expression and patients’ clinical pathological features, we found that high DDX31 expression was strongly correlated with the tumor size (χ2 = 3.9681, p = 0.0464), lymph node metastasis (χ2 = 9.9801, p = 0.0016), and TNM grade (χ2 = 5.8091, p = 0.0159) of PDAC patients and histological grade of tumor tissues (χ2 = 4.3641, p = 0.0369) (Table 1). This evidence concerns the gene DDX31 and neoplasm.