PIWIL2 and neoplasm: Patients with Piwi-like 2 positivity had both an overall and tumor-specific survival of 5.9 months, whereas those with negative Piwi-like 2 staining had an overall survival of 63.9 months with a tumor-specific survival of 82.7 months (P = 0.004 and P < 0.001; Table 2; Fig. 4).