We then performed LASSO regression analysis on the above 18 cuproptosis-related lncRNAs (Figures 3C,D), and finally extracted five cuproptosis-related lncRNAs (FOXD2-AS1, SUCLG2-AS1, LINC00271, NUP153-AS1, LINC02154) in ccRCC (Supplementary Table S6). This evidence concerns the gene FOXD2 and nonpapillary renal cell carcinoma.