CD74 and bladder transitional cell carcinoma: CD74 levels and clinical features were then investigated, finding negative associations between CD74 and high-grade UCEC and BLCA (Fig. S2) and higher CD74 expression in patients with HPV + HNSC, IDHwt-LGG, EBV-STAD, and seminoma-TGCT in comparison with other subtypes (Fig. S2).