【摘 要】
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Background Ampullary tumors are relatively rare in clinical practice.Due to rapid development of endoscopy and imaging techniques, the discovery rate of ampullary tumors has been raised profoundly.Des
【机 构】
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中国医学科学院&北京协和医学院北京协和医院基本外科 100730
【出 处】
：
中华医学会第十七届全国外科学学术会议
论文部分内容阅读
Background Ampullary tumors are relatively rare in clinical practice.Due to rapid development of endoscopy and imaging techniques, the discovery rate of ampullary tumors has been raised profoundly.Despite the increasing numbers of published studies, the etiology for ampullary tumors is incompletely defined.The objective of this study is to evaluate the risk factors for ampullary adenoma and ampullary cancer.
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