STC2 and nonpapillary renal cell carcinoma: The stage I/II ccRCC samples showed an increase in the expression of CA9, NDUFA4L2, HIG2, INHBB, IGFBP3, ANGPTL4, EGLN3, VWF, TYROBP, BHLHE41, STC2, NNMT, SLC16A3, C1QA, and CD36 relative to normal kidney tissue.