RAB13 and neoplasm: Additionally, RAB13 was negatively connected with mutant-allele tumor heterogeneity in COAD (P < 0.05), CESC (P < 0.05), and HNSC (P < 0.05), while it was favorably correlated with mutant-allele tumor heterogeneity in ACC (P < 0.05), ESCA (P < 0.01), and CHOL (P < 0.05).