MST1R and nonpapillary renal cell carcinoma: Considering these results and those that we previously reported for MST1R [14], a gene panel combining OXR1 and MST1R gene promoter methylation was tested, and diagnostic performance increased for discrimination between ccRCC vs RCTs, displaying 90% sensitivity and 98% specificity (AUC = 0.939) (Table 2; Fig. 2b).