PPA2 and neoplasm: Our analysis results also displayed that promoter methylation levels of PPA2 were significantly reduced in several tumor tissues (Figure 6A), including UCEC (p=1.258540E-03), HNSC (p=1.356780E-03), LUSC (p=1.413820E-02), KIRP (p=1.6222000409627E-09), LIHC (p=1.09134923320653E-13), TGCT (p=1.62447832963153E-12), BRCA (p=1.80899739632423E-11), KIRC (1.84160464655747E-11), THCA (p=2.066300E-02), BLCA (p=4.30322444344711E-13), ESCA (p=7.351200E-04), PRAD (p=7.99730000000665E-07), COAD (p=8.848700E-04).