Fig. 4From: Nomograms for predicting risk of locoregional recurrence and distant metastases for esophageal cancer patients after radical esophagectomya Nomograms for predicting risk of distant metastases in esophageal cancer patients after radical esophagectomy. Differentiation: 1 = high differentiation; 2 = middle differentiation; 3 = low differentiation. LVSI, lymph vascular space invasion: 0 = negative(−); 1 = positive(+). PNI, perineural invasion: 0 = negative(−); 1 = positive(+). b Calibration curve for risk of distant metastases nomogram.Back to article page