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There was no invasion of any part of the stomach or intestines and there were no metastases seen. Histopathology of the resected specimen was consistent with that of a gastrointestinal stromal tumour arising from the omentum. Immunohistochemical studies revealed the tumour to be strongly positive for discovered on GIST-1 (DOG1) but negative for both CD117 and CD34. Platelet-derived growth factor receptor \u03b1 (PDGFRA) exon 18 mutation D842V was detected.<\/jats:p>","DOI":"10.1136\/bcr-2014-205528","type":"journal-article","created":{"date-parts":[[2014,11,3]],"date-time":"2014-11-03T15:02:31Z","timestamp":1415026951000},"page":"bcr2014205528","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":7,"title":["Primary omental gastrointestinal stromal tumour (GIST) presenting with a large abdominal mass and spontaneous haemoperitoneum"],"prefix":"10.1136","volume":"2014","author":[{"given":"Isaac","family":"Seow-En","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Francis","family":"Seow-Choen","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tony Kiat Hon","family":"Lim","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wei Qiang","family":"Leow","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2014,11,3]]},"reference":[{"key":"2025042706514520000_2014.nov03_1.bcr2014205528.1","doi-asserted-by":"publisher","DOI":"10.4251\/wjgo.v4.i5.119"},{"key":"2025042706514520000_2014.nov03_1.bcr2014205528.2","doi-asserted-by":"crossref","first-page":"e44","DOI":"10.4081\/rt.2012.e44","article-title":"Extra-gastrointestinal stromal tumor of the omentum: a rare case report and review of the literature","volume":"4","author":"Fagkrezos","year":"2012","journal-title":"Rare Tumors"},{"key":"2025042706514520000_2014.nov03_1.bcr2014205528.3","doi-asserted-by":"publisher","DOI":"10.1186\/1477-7819-5-66"},{"key":"2025042706514520000_2014.nov03_1.bcr2014205528.4","doi-asserted-by":"publisher","DOI":"10.4103\/0973-1482.103527"},{"key":"2025042706514520000_2014.nov03_1.bcr2014205528.5","first-page":"728","article-title":"CD117: a sensitive marker for gastrointestinal stromal tumors that is more specific than CD34","volume":"11","author":"Sarlomo-Rikala","year":"1998","journal-title":"Mod Pathol"},{"key":"2025042706514520000_2014.nov03_1.bcr2014205528.6","doi-asserted-by":"crossref","first-page":"152","DOI":"10.1177\/107327481101800302","article-title":"A CD117 and CD34 immunoreactive sarcoma masquerading as a gastrointestinal stromal tumor: diagnostic pitfalls of ancillary studies in sarcoma","volume":"18","author":"Riddle","year":"2011","journal-title":"Cancer Control"},{"key":"2025042706514520000_2014.nov03_1.bcr2014205528.7","doi-asserted-by":"publisher","DOI":"10.1200\/JCO.2005.14.068"},{"key":"2025042706514520000_2014.nov03_1.bcr2014205528.8","doi-asserted-by":"publisher","DOI":"10.1097\/PAS.0b013e318186b158"},{"key":"2025042706514520000_2014.nov03_1.bcr2014205528.9","doi-asserted-by":"publisher","DOI":"10.1016\/S1470-2045(11)70299-6"}],"container-title":["BMJ Case Reports"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/syndication.highwire.org\/content\/doi\/10.1136\/bcr-2014-205528","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,4,27]],"date-time":"2025-04-27T13:51:52Z","timestamp":1745761912000},"score":1,"resource":{"primary":{"URL":"https:\/\/casereports.bmj.com\/lookup\/doi\/10.1136\/bcr-2014-205528"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2014,11,3]]},"references-count":9,"alternative-id":["10.1136\/bcr-2014-205528"],"URL":"https:\/\/doi.org\/10.1136\/bcr-2014-205528","relation":{},"ISSN":["1757-790X"],"issn-type":[{"type":"electronic","value":"1757-790X"}],"subject":[],"published":{"date-parts":[[2014,11,3]]}}}