Figure 1From: Prognostic significance of solitary lymph node metastasis in patients with squamous cell carcinoma of middle thoracic esophagusSurvival curves in 235 patients according to lymph node status ( P < 0.01). N0 vs. one positive node, P = 0.008; N0 vs. two or more positive nodes, P < 0.001; one positive node vs. two or more positive nodes, P = 0.048.Back to article page