Prediction of lymph node metastatic status in superficial esophageal squamous cell carcinoma using an assessment model combining clinical characteristics and pathologic results: A retrospective cohort study.

•Lymph node metastasis identified in superficial esophageal squamous carcinoma patients.•The risk factors were tumor size, grade, depth of invasion, and angiolymphatic invasion.•A prediction formula established to estimate the rates of potential lymph node metastsis.•A nomogram with scores to help predict lymph node metastasis after endoscopic resection.