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The overall survival (OS) of patients with thoracic esophageal cancer is poor because of the high rate of lymph node metastases. However, recent studies found that the negative lymph node (LN) may also influence the patients' OS. The purpose of this study is to investigate which negative LN stations play a key role in OS prediction.

Influence of negative lymph node in No 7 on survival of patients with middle thoracic esophageal squamous cell carcinoma