NRP1 and renal cell carcinoma: RCC patients scored negative for NRP1 expression, or with NRP1 expression only in endothelial cells (groups 2 and 4) displayed worse outcome as compared to patients with perivascular NRP1 expression (group 1) (see supplementary material, Figure S4C, Log rank test, p‐value = 0.015 and 0.001, respectively).