PTCH1 and bladder transitional cell carcinoma: Analysis of data from TCGA Research Network (https://www.cancer.gov/tcga) revealed a significant positive correlation between the expression of TERT and miR500A, and a negative correlation between PTCH1 and miR500A only in stomach adenocarcinoma (STAC) and bladder urothelial carcinoma (BLCA) (Fig. 6G,H).