FGL1 and nonpapillary renal cell carcinoma: Firstly, FGL1 was expressed in human normal renal tubular epithelial cell line HK‐2, human embryonic kidney derived cell line HEK293T, and seven ccRCC cell lines (ACHN,786‐O, Caki‐1, Caki‐2, A498, SN12, and OSRC2) at varying degrees, among which A498, SN12, and Caki‐2 cells exhibited the highest FGL1 expression (Figure 3A).