Risk factors and a predictive nomogram for lymph node metastasis in superficial esophageal squamous cell carcinoma

Figure 1  Flowchart of enrollment process.

Figure 2 Nomogram for predicting the probability of lymph node metastasis in superficial esophageal squamous cell carcinoma patients. Calculate the total points of different characteristics, and drop a vertical line from the total points row to obtain the probability of lymph node metastasis. MM: Muscularis mucosae; SM1: Upper third of submucosa; SM2: Middle third of submucosa; SM3: Lower third of submucosa; INF pattern: Infiltrative growth pattern; LVI: Lymphovascular invasion; LNM: Lymph node metastasis.

Figure 3 Receiver operating characteristics curve of the nomogram for predicting lymph node metastasis. A: Receiver operating characteristics (ROC) curve in the training set; B: ROC curve in the validation set. AUC: Area under the curve.