PLPP4 and carcinoma: Meanwhile, PLPP4 was considered as a prognostic biomarker because PLPP4 showed “no-expression” or “expression” in normal tissues and carcinoma tissues, like ACC, BLCA, BRCA, DLBC, ESCA, HNSC, LAML, LUAD, LUSC, OV, PAAD, THYM, and so on (Figures 1A and 2).