DPP4 and renal pelvis/ureter urothelial carcinoma: Overexpression of DPP4 in UTUC correlated with higher tumor pT stage (p < 0.001), presence of nodal metastasis (p < 0.001), high histological grade (p = 0.019), vascular invasion (p < 0.001) and frequent mitosis (p = 0.003) (Supplementary Table S5).