PPP2R2A and breast neoplasm: Moreover, deletions in PPP2R2A (gene encoding B55α isoform) are frequently detected in prostate and breast tumours (Cheng et al., 2011; Curtis et al., 2012) and the promoter silencing of PPP2R2B (gene encoding B55β isoform) has been found in colorectal cancer (Yasutis et al., 2010).