PPP4C levels had certain diagnostic accuracy in adrenocortical carcinoma (ACC), lymphoid neoplasm diffuse large B-cell lymphoma (DLBC), ESCA, HNSC, KIRC, KIRP, LIHC, lung adenocarcinoma (LUAD), LUSC, prostate adenocarcinoma (PRAD), skin cutaneous melanoma (SKCM), PCPG, THCA, and thymoma (THYM) for tumor diagnoses. Here, PPP4C is linked to diffuse large B-cell lymphoma.