Figure 4From: Cervical lymph node metastasis classified as regional nodal staging in thoracic esophageal squamous cell carcinoma after radical esophagectomy and three-field lymph node dissection The survival of different fields of positive lymph nodes according to the different pN stages as entire group (A), pN1 stage (B), pN2 stage (C), and pN3 stage (D). Back to article page