WT1 and nonpapillary renal cell carcinoma: In terms of the above analysis from microarray analysis, these 6 lncRNAs (COL18A1-AS1, WT1-AS, LINC00443, TCL6, AL356356.1, and SLC25A5-AS1) involving ceRNA network were regarded as potential biomarkers linked with ccRCC patients (Table 4).