LINC01426 and nonpapillary renal cell carcinoma: With the exception of LINC00894 (Fig. 9L), the expression levels of LINC01426, PVT1, DUXAP8 increased gradually with the increase of stages (Figs. 9M–9O, respectively, all P < 0.05), suggesting these FRlncRNAs were correlated with ccRCC progression.