[Application of endoscopic ultrasonography to preoperative clinical staging of esophageal cancer].

The accuracy rate of EUS is high for preoperative staging of esophageal carcinoma, especially for T3 and mediastinum lymph node. Distinguishing T2 and T3, lymphadenitis and metastatic lymph nodes correctly and diagnosing abdomen lymph node metastasis can improve the diagnosis accuracy rate of EUS.