MSI was a pattern of hypermutation caused by several mechanisms such as MMRs, and it was positively associated with BSG expression in BLCA, GBM, LGG, LUAD, LUSC, PRAD, SARC, STAD, and THCA (p < 0.05) and negatively related with DLBC and LIHC (p < 0.05) (Figure 8C). Here, BSG is linked to bladder transitional cell carcinoma.