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Clinical and histopathological characteristics of patients with duodenal papillary tumors treated at Kitasato University East Hospital.

Endoscopic mucosal resection is now widely used as a minimally invasive curative treatment for early cancer of the esophagus, stomach, and colorectum. Its indication range is now being broadened. In patients with duodenal papillary tumors, however, pancreaticoduodenectomy is generally considered necessary for cure even when the diagnosis is adenoma. Whether this highly invasive procedure is needed has been questioned. Recently, less invasive techniques, such as endoscopic resection, have been used to manage duodenal papillary tumors, but the indications remain a matter of debate. To curatively treat duodenal papillary tumors by endoscopic papillectomy in patients without lymphnode metastasis or distant metastasis, the conditions required for successful outcomes should be defined, similar to the indications for tumors arising in other organs. To collect data that could serve as a basis for defining the indications for endoscopic papillectomy, we studied the natural history and clinical and histopathological features of duodenal papillary tumors. We also studied differences in clinical characteristics between patients whose tumors were associated with familial polyposis and those who had sporadic lesions.