{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,27]],"date-time":"2026-03-27T21:03:51Z","timestamp":1774645431294,"version":"3.50.1"},"reference-count":9,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2022,12,19]],"date-time":"2022-12-19T00:00:00Z","timestamp":1671408000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["DEN Open"],"published-print":{"date-parts":[[2023,4]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Cold snare polypectomy (CSP), for the treatment of colorectal polyps, has become widespread due to its low incidence of adverse events compared to that of endoscopic procedures such as endoscopic mucosal resection. However, we experienced a case of large hematoma development shortly after CSP for a colorectal adenoma despite no bleeding during the procedure. The patient underwent CSP for a 7\u2010mm type Isp lesion in the ascending colon. She returned the following day because of hematochezia. Computed tomography showed a 70\u2010mm, high\u2010intensity mass in the ascending colon, consistent with the large hematoma that was detected by colonoscopy. Although the patient initially had right\u2010sided abdominal pain, it gradually improved with conservative treatment. The hematoma decreased in size, and she was discharged 20 days after emergency admission. Although CSP can be a favorable alternative to more invasive procedures and is expected to be performed more frequently, adverse events, such as that described in this case, should be anticipated.<\/jats:p>","DOI":"10.1002\/deo2.199","type":"journal-article","created":{"date-parts":[[2022,12,20]],"date-time":"2022-12-20T04:55:05Z","timestamp":1671512105000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Large submucosal hematoma after cold snare polypectomy for colorectal adenoma"],"prefix":"10.1002","volume":"3","author":[{"given":"Naomi","family":"Arakane","sequence":"first","affiliation":[{"name":"Department of Gastroenterology and Hepatology National Hospital Organization Tokyo Medical Center  Tokyo Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kosuke","family":"Yoshida","sequence":"additional","affiliation":[{"name":"Department of Gastroenterology and Hepatology National Hospital Organization Tokyo Medical Center  Tokyo Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shoma","family":"Murata","sequence":"additional","affiliation":[{"name":"Department of Gastroenterology and Hepatology National Hospital Organization Tokyo Medical Center  Tokyo Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rika","family":"Mizuno","sequence":"additional","affiliation":[{"name":"Department of Gastroenterology and Hepatology National Hospital Organization Tokyo Medical Center  Tokyo Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Koichi","family":"Furuta","sequence":"additional","affiliation":[{"name":"Department of Gastroenterology and Hepatology National Hospital Organization Tokyo Medical Center  Tokyo Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Masaya","family":"Tojo","sequence":"additional","affiliation":[{"name":"Department of Gastroenterology and Hepatology National Hospital 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Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1675-5670","authenticated-orcid":false,"given":"Seiichiro","family":"Fukuhara","sequence":"additional","affiliation":[{"name":"Department of Gastroenterology and Hepatology National Hospital Organization Tokyo Medical Center  Tokyo 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