PECAM1 and nonpapillary renal cell carcinoma: An innovative prognostic model specific to ccRCC and related to ARESs has been constructed, incorporating three key ARGs: TIMP1 (Tissue Inhibitor of Metalloproteinases 1), PECAM1 (Platelet and Endothelial Cell Adhesion Molecule 1), and CDKN1A (Cyclin Dependent Kinase Inhibitor 1A).