CD68 and sarcoma: Moreover, CD68 expression was positively correlated (P < 0.05) with TMB in UCEC, SKCM, sarcoma (SARC), READ, PRAD, LGG, KIRP, KIRC, COAD, CESC, and BRCA, and negatively correlated (P < 0.05) with TMB in THCA, READ, LIHC, LAML, and GBM (Fig. 7C).