piRNA-30473 is elevated in DLBCL and is a negative prognostic factor for patients with DLBCL. (A) Heat map representation of transcriptome array data on the expression levels of piRNAs in DLBCL patients with a poor prognosis (PP) (n = 3) and DLBCL patients with a favorable prognosis (FP) (n = 3). (B) qPCR analysis of piRNA expression in DLBCL patients with a poor prognosis (n = 21) and DLBCL patients with a favorable prognosis (n = 21). ns, not significant; **P < .01. (C) OS was plotted and compared using the Kaplan-Meier method and log-rank test. piRNA-30473 was dichotomized at the median based on low vs high expression.