NRP1 and cancer: For stromal score, NRP1 showed the highest positive correlation across all cancer types (r = 0.59), followed by PLXND1 (r = 0.54), NRP2 (r = 0.50), PLXNC1 (r = 0.48) and PLXNA4 (r = 0.28) (p < 0.0001).