Endoscopic papillectomy for ampullary adenoma and early adenocarcinoma: Analysis of factors related to treatment outcome and long‐term prognosis

Objectives There are few reports on the long‐term prognosis of papillary tumors after endoscopic papillectomy. Here, we report a retrospective study of the therapeutic effects, long‐term prognosis, and affecting factors. Methods The inclusion criteria were papillary adenoma with/without an adenocarcinoma component on biopsy results and ≤10 mm intraductal extension, and the exclusion criteria were moderate to poorly differentiated adenocarcinoma...