KCTD5 expression showed significant correlation with immune subtypes in BLCA (P = 8.52e-07), BRCA (P = 9.56e-27), LUAD (P = 3.85e-11), LUSC (P = 4.07e-03), PAAD (P = 3.19e-04), PRAD (P = 1.52e-10), SARC (P = 2.2e-03), STAD (P = 2.57e-08), UCEC (P = 1.54e-09), and KIRC (P = 1.48e-02). Here, KCTD5 is linked to bladder transitional cell carcinoma.