However, in multivariate Cox analysis with OS, perineural invasion (HR = 1.701, 95% CI 1.036–2.792, p = 0.036) remained significantly associated with OS, but not with tumor RAD50 expression (HR = 0.712, 95% CI 0.462–1.095, p = 0.122) (Table S1). Here, RAD50 is linked to neoplasm.