SLC7A11, HMOX1, and MT1G were the 3 FRGs associated with the prognosis of adrenocortical carcinoma (ACC), KICH, KIRC and KIRP, while the SLC7A11 is a prognostic risk factor for above 4 different renal tumors, and high expression of MT1G increases the prognostic risk of ACC, ccRCC and chRCC (119). Here, HMOX1 is linked to nonpapillary renal cell carcinoma.