An endoscopic ultrasound showed that the tumor originated in the submucosal layer of the digestive wall 内视镜超音波检查发现此肿瘤源自于胃肠道壁的黏膜下层。
2.
An endoscopic ultrasonography showed that the hyperechoic lesion originated in the submucosal layer of the duodenal wall 内视镜超音波检查发现此高回音肿瘤源自于十二指肠壁的黏膜下层。
