研究单位：[1]Chinese Academy of Medical Sciences[2]Peking University Cancer Hospital & Institute[3]Henan Cancer Hospital[4]Hebei Medical University Fourth Hospital[5]Sichuan Cancer Hospital and Research Institute[6]Fujian Cancer Hospital[7]Liaoning Tumor Hospital & Institute[8]Zhejiang Cancer Hospital[9]Tongji Hospital[10]Tang-Du Hospital[11]Shanghai Chest Hospital
研究目的：
The purpose of this study is to compare the lymph node dissection results and prognosis in thoracic esophageal carcinoma patients without cervical lymph node involvement by preoperative CT and/or ultrasound treated by two-field lymphadenectomy or three-field lymphadenectomy.Another purpose of this study is to clarify whether the lymph node along the right recurrent laryngeal nerve can be taken as the sentinel lymph node which is able to indicate neck lymph node metastasis and necessity for three-field lymphadenectomy.
