The conventional endoscopy can observe the surface of the colorectal eminence lesions; however, it cannot assess the submucosal lesions, which lead to a wrong diagnosis and therapy.

• 背景和目的大肠隆起性病变是常见的肠镜影像，这种隆起可能由炎症与肿瘤形成，也可能由邻近正常器官压迫形成。