SLND Versus Non-Dissection Following ESD for T1a Stage Esophageal Squamous Cell Carcinoma

Systematically Mediastinal Lymph Node Dissection (SLND) Versus Non-Dissection Following Endoscopic Submucosal Dissection (ESD) for T1a Stage Esophageal Squamous Cell Carcinoma

This is a study from Fujian Cancer Hospital Thoracic of Surgery Project, numbered as FJCHTOSP-1. Systematically mediastinal Lymph Node Dissection (SLD) Versus Non-Dissection Following Endoscopic Submucosal Dissection (ESD) for T1a Stage Esophageal Squamous Cell Carcinoma: a single-center, prospective clinical trial.

Participants will be evaluated for inclusion criteria and exclusion criteria, and then sign informal consent if desired. Participants will be randomly assigned to the intervention according to a prepared random tables. Participants in the systematically mediastinal lymph node dissection (SLND) group will receive systematically mediastinal lymph node dissection, while those in the non-SLND group will not receive mediastinal lymph node dissection. The primary endpoint is 3-year disease-free survival (DFS).

The sample size are estimated with reference to investigators' previous data, in which the 3-year DFS was 62.7% for patients diagnosed with T1a Stage Esophageal Squamous Cell Carcinoma and underwent Endoscopic Submucosal Dissection without SLND. Investigators assumed that if 3-year DFS of patients in SLND group was over 80%, then investigatorswould deem the SLND group to be superior to the non-SLND group. The sample size are estimated to be 102. Therefore, the total number of patients enrolled are designed to be 102.

Inclusion Criteria:

• Clinical stage T1aN0M0.
• A lesion detected on Endoscopic Ultrasound featured as T1a stage.
• Age 18 to 75.
• Patients who have signed the informed consent form.

Exclusion Criteria:

• • Other than invasive adenocarcinoma by pathological analysis.

  • Not complete resected or curative intent.
  • Patients who have history of other malignant tumors.
  • Patients who have history of thoracic surgery.
  • Patients who have received radiation, chemotherapy or other treatments previously.