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.

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Endoscopic ultrasound has dramatically extended the reach lumen and into adjacent organs and the mediastinum.

超声内镜已经在整个胃肠道系统得到广泛应用,甚至应用到邻近脏器和纵隔.

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