Further, the box plot showed that the expression level of IGFLR1 in ccRCC was higher than that in fetal kidney and kidney significantly (2.157 vs. 0.251, 0.314, p < 0.05) based on literature (Yusenko et al., 2009; Figure 1C). Here, IGFLR1 is linked to nonpapillary renal cell carcinoma.