POU5F1 and neoplasm: In multivariate cox regression analysis for pgRNA (HR = 4.541, p = 0.033), tumor size (HR = 5.423, p = 0.008), antiviral therapy (HR = 7.945, p = 0.004), and OCT4 (HR = 3.456, p = 0.072) were in the equation (Table 4), which means the high pgRNA level group was the risk factor for recurrence.