RAD52 and neoplasm: Presence of somatic copy number gain was also correlated with higher RAD52 expression levels in both HNSC and LUSC tumors, (p = 6x10−48 and 3x10−29, respectively) (Fig. 3), with copy number at this locus accounting for a large proportion of the variance in RAD52 tumor expression levels (57% in HNSC and 45% in LUSC).