NRP1 and neoplasm: The multivariable analyses identified independent favorable prognostic significance of expression of NRP1 in perivascular tumor cells in the discovery cohort (HR = 0.3, 95% CI = 0.1–0.6, p‐value <0.001), and in the validation cohort (HR = 0.5, 95% CI = 0.3–0.9, p‐value = 0.02) (Table 2), but not for total tumor cell expression of NRP1 (see supplementary material, Table S3).