KLK3 and pachyonychia congenita: Correlations between snRNA levels and several clinicopathological factors (e.g., preoperative PSA level, ISUP Grade Group, and tumor stage) were also investigated (Table 4); the absence of correlations between the snRNAs and these factors, with the exception of preoperative PSA level, suggest that the PC-associated snRNAs could provide unique prognostic information.