RELT and nonpapillary renal cell carcinoma: RELT expression has a positive correlation with Tregs (R = 0.27) and an inverse correlation with resting mast cells (R = 0.29) in clear cell renal cell carcinoma (ccRCC) [75], suggesting that the negative outcome of RELT expression on RCC patient survival may be in part due to the promotion of a tumor suppressive environment.