PIK3CD and cancer: The pan-cancer correlations between PIK3CD and the expression levels of 40 kinds of the m1A/m5C/m6A regulators in 5 cancer types were shown in Fig. 9A. There was a strong association (P < 0.05) between the expression levels of the 41 different m1A/m5C/m6A regulators and PIK3CD in 5 different cancer types.