RAC1 and neoplasm: We observed that an elevated expression of RAC1 is associated with a Gain status in CNV, surpassing the expression observed in instances where CNV status was either Neutral or characterized by a Loss in 20 tumour types, including GBM, GBMLGG, LGG, CESC, LUAD, COAD, READ, BRCA, ESCA, STES, SARC, STAD, UCEC, HNSC, LUSC, LIHC, MESO, OV, TGCT, SKCM and BLCA (Fig. S3a).