CD4 and glioblastoma: Among them, BOP1 expression was found to be positively related to the levels of infiltrating natural regulatory (nTreg) cell (except in THCA and THYM), Th1 cell (except in LGG, SKCM, and THCA), neutrophil cell (except in THYM), and monocyte cell (except in TGCT, THCA, and THYM) and negatively related to the levels of infiltrating central memory T (Tcm) cell, NK cell (except in KIRC), CD4-T cell (except in GBM and THCA), mucosal associated invariant T (MAIT) cell (except in THCA and MESO), and follicular helper T (Tfh) cell (except in KICH and THYM).