STC1 and nonpapillary renal cell carcinoma: Additionally, Ma et al. (2015) pointed out that the expression of STC1 in clear cell renal cell carcinoma (ccRCC) was significantly upregulated, especially in metastatic ccRCC, meanwhile knockdown of STC1 expression inhibited cell proliferation, migration and invasion, as well as damage EMT of ccRCC, which was consistent with our results.