Fig. 4From: Patterns and prognostic predictive value of perineural invasion in esophageal squamous cell carcinomaSurvival curves of ESCC patients with different PNI subtypes. a DFS of ESCC according to different PNI subtypes; b OS of ESCC according to different PNI subtypes. ESCC, oesophageal squamous cell carcinoma; PNI, perineural invasion; DFS, disease-free survival; OS, overall survivalBack to article page