{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,20]],"date-time":"2025-12-20T21:55:35Z","timestamp":1766267735213,"version":"3.41.2"},"reference-count":10,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2022,4,10]],"date-time":"2022-04-10T00:00:00Z","timestamp":1649548800000},"content-version":"vor","delay-in-days":9,"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":[[2022,4]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Malignant gastrointestinal neuroectodermal tumors (GNETs) are rare malignant mesenchymal neoplasms. To our knowledge, only 99 cases have been reported worldwide. The tumor has an aggressive malignancy, with a rapid progression. The histological features of GNET overlap with those of clear cell sarcoma, which contain Ewing sarcoma breakpoint region 1 mutation. GNETs lack melanocyte\u2010specific markers, while clear cell sarcoma exhibits melanocytic differentiation. Various symptoms have been reported previously, and the most reported lesion is in the small bowel. The patient was a 69\u2010year\u2010old man who presented with abdominal pain and vomiting. Computed tomography revealed a nodule in the small bowel, which induced small intestinal obstruction. Enteroscopic images revealed a submucosal tumor. Surgery was performed, and the patient was diagnosed with GNET. Only two patients whose primary lesions were in the small intestine, including the patient in this report, have undergone enteroscopy before surgery. This is a rare case of GNET in which a patient underwent enteroscopy before surgical treatment.<\/jats:p>","DOI":"10.1002\/deo2.119","type":"journal-article","created":{"date-parts":[[2022,4,11]],"date-time":"2022-04-11T05:43:48Z","timestamp":1649655828000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Malignant gastrointestinal neuroectodermal tumor presenting with small intestinal obstruction: A case report"],"prefix":"10.1002","volume":"2","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4196-7766","authenticated-orcid":false,"given":"Makiko","family":"Sasaki","sequence":"first","affiliation":[{"name":"Department of Gastroenterology Japan Community Health Care Organization Chukyo Hospital Aichi Japan"},{"name":"Department of Gastroenterology and Metabolism Nagoya City University Graduate School of Medical Science Aichi Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8416-5774","authenticated-orcid":false,"given":"Mamoru","family":"Tanaka","sequence":"additional","affiliation":[{"name":"Department of Gastroenterology and Metabolism Nagoya City University Graduate School of Medical Science Aichi Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Koki","family":"Asukai","sequence":"additional","affiliation":[{"name":"Department of Gastroenterology Japan Community Health Care Organization Chukyo Hospital Aichi Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hiroki","family":"Koguchi","sequence":"additional","affiliation":[{"name":"Department of Gastroenterology Japan Community Health Care Organization Chukyo Hospital Aichi Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yusuke","family":"Inoue","sequence":"additional","affiliation":[{"name":"Department of Gastroenterology Japan 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