{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,19]],"date-time":"2026-05-19T23:07:55Z","timestamp":1779232075332,"version":"3.51.4"},"reference-count":20,"publisher":"Georg Thieme Verlag KG","issue":"CP","license":[{"start":{"date-parts":[[2026,5,19]],"date-time":"2026-05-19T00:00:00Z","timestamp":1779148800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Endosc Int Open"],"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Although endoscopic papillectomy is an established minimally invasive alternative to surgical resection for ampullary tumors, its technical aspects remain poorly defined. This study aimed to identify factors associated with piecemeal resection and recurrence-free survival after endoscopic papillectomy.<\/jats:p>\n                  <jats:p>A multicenter, retrospective analysis of consecutive patients who underwent endoscopic papillectomy in six tertiary Polish centers between 2011 and 2023 was performed. Multivariable logistic and Cox regression models were applied.<\/jats:p>\n                  <jats:p>A total of 192 patients were included. Adverse events occurred in 26.6% of patients. The most frequent were bleeding (17.3%) and acute pancreatitis (15.6%). En bloc resection was achieved in 66.1% of tumors. Larger tumor size (odds ratio [OR] 1.07 per mm increase; 95% confidence interval [CI] 1.02\u20131.12]; P = 0.004) and submucosal injection (OR 5.50; 95% CI 1.82\u201316.68; P = 0.003) were associated with piecemeal resection. Among 142 patients with a median follow-up of 12 months, recurrence occurred in 40.8%. Tumor size (hazard ratio [HR] 1.04 per mm increase; 95% CI 1.03\u20131.06; P &lt; 0.001) and piecemeal resection (HR 2.37; 95% CI 1.23\u20134.57; P = 0.010) were independently associated with shorter recurrence-free survival.<\/jats:p>\n                  <jats:p>Larger tumors and piecemeal resection were independently associated with shorter recurrence-free survival. Optimization of technical aspects to achieve higher en bloc resection rates may be critical to reduce recurrence.<\/jats:p>","DOI":"10.1055\/a-2863-1302","type":"journal-article","created":{"date-parts":[[2026,5,19]],"date-time":"2026-05-19T22:53:11Z","timestamp":1779231191000},"source":"Crossref","is-referenced-by-count":0,"special_numbering":"S","title":["Endoscopic papillectomy for ampullary tumors: Multicenter retrospective study"],"prefix":"10.1055","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0009-0005-1719-1215","authenticated-orcid":false,"given":"Katarzyna","family":"Po\u0142omska","sequence":"additional","affiliation":[{"name":"Medical University of Gdansk, Poland","place":["Gdansk"],"department":["Department of Surgical Oncology, Transplant Surgery and General Surgery"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nastazja D.","family":"Pilonis","sequence":"additional","affiliation":[{"name":"The Maria Sklodowska-Curie National Research Institute 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Poland","place":["Warsaw"],"department":["Department of Oncological Gastroenterology"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Marcin","family":"Romanczyk","sequence":"additional","affiliation":[{"name":"Academy of Silesia, Silesian Voivodeship, Poland","place":["Katowice"],"department":["Department of Gastroenterology"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wladyslaw","family":"Januszewicz","sequence":"additional","affiliation":[{"name":"The Maria Sklodowska-Curie National Research Institute of Oncology in Warsaw, Masovian Voivodeship, Poland","place":["Warsaw"],"department":["Department of Oncological Gastroenterology"]},{"name":"Centre for Postgraduate Medical Education, Poland","place":["Warszawa"],"department":["Department of Gastroenterology, Hepatology and Clinical Oncology"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Andrzej","family":"Bialek","sequence":"additional","affiliation":[{"name":"Pomeranian Medical University, Poland","place":["Szczecin"],"department":["Department of Gastroenterology"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jacek T.","family":"Drzewiecki","sequence":"additional","affiliation":[{"name":"Provincial Integrated Hospital, Poland","place":["Elblag"],"department":["Department of Internal Medicine and Gastroenterology"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Piotr","family":"Wosiewicz","sequence":"additional","affiliation":[{"name":"Medical University of Silesia, Poland","place":["Katowice"],"department":["Department of Gastroenterology and Hepatology"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lukasz","family":"Krupa","sequence":"additional","affiliation":[{"name":"Teaching Hospital No 1 in Rzesz\u00f3w, Poland","place":["Rzeszow"],"department":["Department of Gastroenterology and Hepatology with Internal Disease Unit"]},{"name":"University of Rzeszow, Poland","place":["Rzeszow"],"department":["Medical Department"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Krzysztof","family":"Kurek","sequence":"additional","affiliation":[{"name":"Medical University of Bialystok, Poland","place":["Bia\u0142ystok"],"department":["Department of Gastroenterology and Internal Medicine"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tomasz","family":"Marek","sequence":"additional","affiliation":[{"name":"Medical University of Silesia, Poland","place":["Katowice"],"department":["Department of Gastroenterology and Hepatology"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Michal","family":"Kaminski","sequence":"additional","affiliation":[{"name":"Centre for Postgraduate Medical Education, Poland","place":["Warszawa"],"department":["Department of Gastroenterology, Hepatology and Clinical Oncology"]},{"name":"Medical University of Gdansk, Poland","place":["Gdansk"],"department":["Department of Surgical 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