SLC7A11 and renal carcinoma: The combination of receiver operating characteristic (ROC) curves, Kaplan-Meier analysis, and Cox regression analysis revealed that high expression of SLC7A11 was a prognostic risk factor for four different types of renal cancers, low expression of HMOX1 was a poor prognostic marker for patients, and increased expression of MT1G increased the prognostic risk for three additional classes of renal cancer patients, except for those with renal papillary cell carcinoma.