Additional Consolidative Esophagectomy for the Patients With Oligometastatic Resectable ESCC

Inclusion Criteria: 1. Histologically confirmed ESCC, and stage was evaluated as cT1-4aN0-3 with oligometastases at initial treatment(According to UICC TNM version 8). \*Oligonucleotides transfer is defined as: there are 3 or less than 3 lesions in single organ(lung, liver, brain or bone), and could be resected, radiofrequency ablation or radiotherapy in 1 radiation fied; Supraclavicular lymph node metastasis is defined as a distant metastases, celiac axis lymph nodes are considered as regional lymph nodes for the patients with lower 1/3 ESCC; Supraclavicular lymph nodes in patients with upper thoracic and cervical esophageal cancer were defined as regional lymph nodes, while abdominal trunk lymph nodes were considered as distant metastases； 2. No new metastatic lesions were found after more than 3 months of systemic treatment, and primary esophageal cancer lesions and regional lymph nodes can be resected R0; 3. No serious internal disease, KPS score ≥90; 4. The evaluation of various organ functions can tolerate surgery, radiotherapy and other treatments; 5. The following laboratory tests confirmed that bone marrow, liver and kidney function met the requirements for study participation: Hemoglobin ≥9.0g/L; White blood cell count ≥3.5×109/L; Neutrophil absolute value (ANC) ≥1.5×109/L; Platelet count ≥100×109/L; Total bilirubin ≤1.5 times the upper limit of normal value; ALT and AST≤2 times the upper limit of normal value; The international standardized ratio of prothrombin time was less than 1.5 times the upper limit of normal value, and part of the thrombin time was within the normal range; Creatinine ≤1.5 times the upper limit of normal value; 6. Physical state ECOG 0-1; 7. Subject must understand and sign the informed consent form. Exclusion Criteria 1. Patients with double primary cancer; 2. mental patients; 3. Patients with parotid or salivary gland diseases; 4. Mediastinal lymph nodes could not be thoroughly dissected during radical resection of esophageal cancer; Or the oligometastatic lesions cannot receive local treatment due to location and other reasons; 5. Patients with severe emphysema and pulmonary fibrosis; 6. Active infections requiring medical treatment; 7. Existing or co-existing hemorrhagic disease; 8. Other uncontrollable patients who cannot tolerate chemoradiotherapy or surgery; 9. Patients who cannot be thoroughly cleaned due to previous operations; 10. Pregnant or lactating female patients.