The diagnostic accuracy of the different modalities was 85.7%, 66.7%, 23.1% for EUS, UGI barium meal study and panendoscopic biopsy respectively.

• 结果正确诊断粘膜下肿瘤的凖确率，分别为内视镜超音波85.；7%25，上肠胃道钡剂摄影66