The transcription levels of PPP4C significantly correlated with patient OS in 15 tumor types, of which PPP4C was a risk factor for poor prognosis in ACC, BRCA, HNSC, KIRC, KIRP, LAML, LGG, LIHC, LUAD, MESO, PAAD, and UVM, whereas a protective factor for better OS in CESC, READ, and THYM (Fig. S3). This evidence concerns the gene PPP4C and adrenal cortex carcinoma.