CADM1 and nonpapillary renal cell carcinoma: Yao et al. reported lncRNA CADM1-AS1, which is located in the antisense direction of a coding exon of tumor suppressor gene CADM1, was decreased in tumor tissues of ccRCC patients and it may regulate CADM1 expression on proliferation, apoptosis and migration via the expression pattern of “CADM1-AS1/CADM1 mRNA gene pairs” in vitro [12].