XIAP and head and neck squamous cell carcinoma: More strikingly, by mining the data from TCGA, we also found the negative correlation between miR-137 and XIAP in multiple types of cancers, including breast cancer (BRCA), bladder urothelial cancer (BLCA), cervical squamous cell carcinoma and endocervical adenocarcinoma (CESC), stomach adenocarcinoma (STAD) and head and neck squamous cell carcinoma (HNSC) (Figure 5B).