KLRC1 and glioblastoma: Notably, in tumors where high PLAC1 expression is associated with a favorable prognosis (ESCA, GBM, LUSC), we observed a positive correlation between PLAC1 and the genes XCL1, KLRC1 (NKG2A), KLRC2 (NKG2C) and TKTL1, and a negative correlation with the MLC1 gene (Figure 4).