To clarify the effect of Two-field or Three-field Lymphadenectomy on the survival of esophageal squamous cell carcinoma.

Inclusion Criteria:

• 1. Men and women aged 18-85 years
• 2. Histologically confirmed primary thoracic esophageal squamous cell carcinoma,
• 3. Staging PT1b-4A, N0-3, M0 AJCC eighth edition
• 4. Excluding lymph node dissection < 15, (meeting the guideline criteria)
• 5. The tumor located in the lower middle thoracic.

Exclusion Criteria:

• 1. Patients with a history of previous thoracic and abdominal surgery that may affect lymphatic reflux
• 2. Patients with distant metastasis confirmed by imaging
• 3. Patients with obvious surgical contraindications.

Patients with esophageal cancer and need surgical treatment.

We are willing to share data, analytic methods, and study materials related to this article with other researchers. Provided that all of the above will not be used for commercial or profit purposes. Other researchers can contact the corresponding author of this article by email and indicate the required research materials and purpose. We will be glad to provide relevant materials for this study after approval and discussion.