STAM and nonpapillary renal cell carcinoma: Similarly, we also compared the STAM1 protein level between different ccRCC T stages (pT1 and 2 vs. pT3 and 4), tumor grade (grade 1 and 2 vs. grade 3 and 4), and AJCC stages (stage I and II vs. stage III and IV) in the TM cohort (Figure 4).