癌症是全球最主要的健康问题之一，在美国也是致死原因之一。消化道癌症占据全球约三分之一的癌症死亡率，是最致命的癌症之一。早期诊断和及时治疗是预防癌症相关疾病和死亡的关键。随着技术和内镜技术的进步，内镜检查已成为消化道癌症诊断和治疗的核心。在这个广泛的综述中，作者讨论了内窥镜在食管癌、胃癌、结直肠癌、胰腺癌、乳头状肿瘤、胆道癌和小肠癌早期检测、诊断和治疗中的作用。© 2022作者。由Wiley Periodicals LLC代表美国癌症协会出版的《CA：临床医师癌症杂志》。

Cancer is one of the foremost health problems worldwide and is among the leading causes of death in the United States. Gastrointestinal tract cancers account for almost one third of the cancer-related mortality globally, making it one of the deadliest groups of cancers. Early diagnosis and prompt management are key to preventing cancer-related morbidity and mortality. With advancements in technology and endoscopic techniques, endoscopy has become the core in diagnosis and management of gastrointestinal tract cancers. In this extensive review, the authors discuss the role endoscopy plays in early detection, diagnosis, and management of esophageal, gastric, colorectal, pancreatic, ampullary, biliary tract, and small intestinal cancers.© 2022 The Authors. CA: A Cancer Journal for Clinicians published by Wiley Periodicals LLC on behalf of American Cancer Society.