食管癌发生、发展具有癌灶多点起源和淋巴结双向、跳跃性转移的特点，是导致术后第二个原发癌和复发、转移的主要原因。欲达镜下和肉眼无癌残留的根治性切除（RO），传统的胸腹二野淋巴结切除（2－FL）难有足够的切除长度和广度，也是近年来施行颈、胸、腹三野淋巴结清扫（thre The occurrence and development of esophageal cancer have the characteristics of multifocal origins of cancer foci and the bidirectional and skipping metastasis of lymph nodes, which is the main reason leading to postoperative second primary cancer, recurrence and metastasis. For radical resection (RO) with microscopic and macroscopic cancer-free residuals, the traditional thoracic-abdominal lymphadenectomy (2-FL) is difficult to have adequate resection length and breadth. It has also been used in recent years as a three-field lymph node for neck, chest and abdomen. Cleaning (thre