Figure 3From: Cervical lymph node metastasis classified as regional nodal staging in thoracic esophageal squamous cell carcinoma after radical esophagectomy and three-field lymph node dissection Overall survival of patients presenting with positive nodes in the lower region (i.e., middle and lower mediastinal and upper abdominal beds) (red line), the upper region (i.e., cervical and upper mediastinal beds) (blue line), and in the middle region (green line). Back to article page