Clinical Value and Efficacy Index of Lymphadenectomy for Thoracic Escc

Clinical Value and Efficacy Index of Lymphadenectomy for Thoracic Esophageal Squamous Cell Carcinoma

The goal of this observational study is to to clarify the focus of lymph node dissection during esophagectomy.. The main question[s] it aims to answer is:

• provide a basis for accurate staging and the relationship between OS and lymph node dissection

Inclusion Criteria:

1. Pathologic findings proved ESCC (8th AJCC/UICC stage T1b-4aN0-3M0)
2. Underwent esophagecomy (two-field or three-field LN dissection)
3. The primary tumor was thoracic ESCC

Exclusion Criteria:

1. Located outside the thoracic
2. Patients underwent salvage or R1/R2 esophagecomy
3. The number of resected lymph nodes (RLNs) less than 15
4. With neoadjuvant therapy(NT) or salvage chemoradiotherapy(SCRT)