The relation between BRD9 expression and TMB across all tumour types indicated that BRD9 expression was positively related with TMB in ACC, LUAD, MESO, PAAD and skin cutaneous melanoma (SKCM), but negatively related with that in breast invasive carcinoma (BRCA), THCA, thymoma (THYM) and uveal melanoma (UVM) (Figure S1A). This evidence concerns the gene BRD9 and thymoma.