目的观察大肠侧向发育型肿瘤（LST）的大体形态、隐窝开口及其与病理组织学的相关性；

Objective To observe the general shape and pit patterns of the laterally spreading tumors(LST)as well as their relationship with pothohistology;

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目的观察大肠侧向发育型肿瘤（LST）的大体形态、隐窝开口及其与病理组织学的相关性；

Objective To observe the general shape and pit patterns of the laterally spreading tumors(LST)as well as their relationship with pothohistology;

youdao