{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,31]],"date-time":"2026-07-31T20:17:05Z","timestamp":1785529025442,"version":"3.56.0"},"reference-count":14,"publisher":"Oxford University Press (OUP)","issue":"7","license":[{"start":{"date-parts":[[2026,7,31]],"date-time":"2026-07-31T00:00:00Z","timestamp":1785456000000},"content-version":"vor","delay-in-days":30,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,7,4]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Gastrointestinal stromal tumours (GISTs) most commonly arise in the stomach or small intestine, whereas retroperitoneal lesions are rare. A 69-year-old woman without neurofibromatosis type 1 underwent single-incision laparoscopic resection for a high-risk jejunal GIST. Four months later, follow-up computed tomography revealed a 25-mm retroperitoneal tumour adjacent to the right common iliac artery, which had been retrospectively identifiable on the initial imaging. Laparoscopic excision was successfully performed, and pathological examination confirmed GIST. The patient resumed adjuvant imatinib therapy and remains disease-free at 12\u00a0months. Retrospective review of 18 surgically treated small intestinal GISTs at our institution showed that most multiple lesions were associated with neurofibromatosis type 1 or peritoneal dissemination, whereas the present case represented an exceptionally rare sporadic presentation. Careful imaging assessment and postoperative surveillance are essential for detecting atypical extra-gastrointestinal lesions.<\/jats:p>","DOI":"10.1093\/jscr\/rjag667","type":"journal-article","created":{"date-parts":[[2026,7,22]],"date-time":"2026-07-22T12:07:35Z","timestamp":1784722055000},"source":"Crossref","is-referenced-by-count":0,"title":["Small intestinal gastrointestinal stromal tumour with a coexisting retroperitoneal tumour: a case report and institutional review"],"prefix":"10.1093","volume":"2026","author":[{"given":"Hana","family":"Futagami","sequence":"first","affiliation":[{"name":"Department of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences , Okayama ,","place":["Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0001-1949-9492","authenticated-orcid":false,"given":"Yusuke","family":"Yoshida","sequence":"additional","affiliation":[{"name":"Department of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences , Okayama ,","place":["Japan"]},{"name":"Department of Surgery, Okayama Saiseikai General Hospital , Okayama ,","place":["Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ryohei","family":"Shoji","sequence":"additional","affiliation":[{"name":"Department of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences , Okayama ,","place":["Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuki","family":"Matsumi","sequence":"additional","affiliation":[{"name":"Department of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences , Okayama ,","place":["Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2026,7,31]]},"reference":[{"key":"2026073114305107400_ref1","volume-title":"StatPearls","author":"Gastrointestinal Stromal Tumors","year":"2024"},{"key":"2026073114305107400_ref2","doi-asserted-by":"publisher","first-page":"842","DOI":"10.3390\/gidisord6040059","article-title":"Unraveling gastric and small intestine gastrointestinal stromal tumors: a review of our current knowledge","volume":"6","author":"Eskitzis","year":"2024","journal-title":"Gastrointest Disord"},{"key":"2026073114305107400_ref3","doi-asserted-by":"publisher","first-page":"84","DOI":"10.1016\/j.ijscr.2020.12.095","article-title":"Small bowel gastrointestinal stromal tumor presenting with gastrointestinal bleeding in patient with type 1 neurofibromatosis: management and laparoscopic treatment. Case report and review of the literature","volume":"79","author":"Mandal\u00e0","year":"2021","journal-title":"Int J Surg Case Rep"},{"key":"2026073114305107400_ref4","doi-asserted-by":"publisher","first-page":"e29487","DOI":"10.1097\/MD.0000000000029487","article-title":"The analysis of prognostic factors of primary small intestinal gastrointestinal stromal tumors with R0 resection: a single-center retrospective study","volume":"101","author":"Qu","year":"2022","journal-title":"Medicine (Baltimore)"},{"key":"2026073114305107400_ref5","doi-asserted-by":"publisher","first-page":"85","DOI":"10.1186\/s12957-023-02968-0","article-title":"Gastrointestinal stromal tumors of the small intestine: the challenge of diagnosis and the outcome of management","volume":"21","author":"Hamed","year":"2023","journal-title":"World J Surg Oncol"},{"key":"2026073114305107400_ref6","doi-asserted-by":"publisher","first-page":"3877","DOI":"10.2147\/CMAR.S238227","article-title":"Gastrointestinal stromal tumors of the small intestine: progress in diagnosis and treatment research","volume":"12","author":"Peng","year":"2020","journal-title":"Cancer Manag Res"},{"key":"2026073114305107400_ref7","doi-asserted-by":"publisher","first-page":"56","DOI":"10.1186\/s13000-020-00939-7","article-title":"Clinicopathologic characteristics, diagnostic clues, and prognoses of patients with multiple sporadic gastrointestinal stromal tumors: a case series and review of the literature","volume":"15","author":"Shen","year":"2020","journal-title":"Diagn Pathol"},{"key":"2026073114305107400_ref8","doi-asserted-by":"publisher","first-page":"98","DOI":"10.1016\/j.ijscr.2015.01.025","article-title":"Unique case of sporadic multiple gastro intestinal stromal tumour","volume":"9","author":"Graziosi","year":"2015","journal-title":"Int J Surg Case Rep"},{"key":"2026073114305107400_ref9","doi-asserted-by":"publisher","first-page":"1321179","DOI":"10.3389\/fonc.2024.1321179","article-title":"Case report: detection of multiple sporadic gastrointestinal stromal tumors by dual-time 18 F-FDG PET\/CT","volume":"14","author":"Li","year":"2024","journal-title":"Front Oncol"},{"key":"2026073114305107400_ref10","doi-asserted-by":"publisher","first-page":"577","DOI":"10.1097\/PAS.0000000000000807","article-title":"GIST manifesting as a retroperitoneal tumor: clinicopathologic immunohistochemical, and molecular genetic study of 112 cases","volume":"41","author":"Miettinen","year":"2017","journal-title":"Am J Surg Pathol"},{"key":"2026073114305107400_ref11","doi-asserted-by":"publisher","first-page":"577","DOI":"10.1038\/modpathol.3880099","article-title":"Extragastrointestinal (soft tissue) stromal tumors: an analysis of 48 cases with emphasis on histologic predictors of outcome","volume":"13","author":"Reith","year":"2000","journal-title":"Mod Pathol"},{"key":"2026073114305107400_ref12","doi-asserted-by":"publisher","first-page":"1033598","DOI":"10.3389\/fonc.2023.1033598","article-title":"Primary extra-gastrointestinal stromal tumor of retroperitoneum: clinicopathologic characteristics and prognosis of six cases","volume":"13","author":"Lin","year":"2023","journal-title":"Front Oncol"},{"key":"2026073114305107400_ref13","doi-asserted-by":"publisher","first-page":"43","DOI":"10.4103\/2156-7514.99177","article-title":"Radiological features of metastatic gastrointestinal stromal tumors","volume":"2","author":"Patnaik","year":"2012","journal-title":"J Clin Imaging Sci"},{"key":"2026073114305107400_ref14","doi-asserted-by":"publisher","first-page":"86","DOI":"10.1186\/s40792-016-0212-z","article-title":"Co-occurrence of liver metastasis of gastrointestinal stromal tumor and hepatocellular carcinoma: a case report","volume":"2","author":"Yamashita","year":"2016","journal-title":"Surg Case Rep"}],"container-title":["Journal of Surgical Case Reports"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/academic.oup.com\/jscr\/article-pdf\/2026\/7\/rjag667\/70416588\/rjag667.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/academic.oup.com\/jscr\/article-pdf\/2026\/7\/rjag667\/70416588\/rjag667.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,7,31]],"date-time":"2026-07-31T18:30:59Z","timestamp":1785522659000},"score":1,"resource":{"primary":{"URL":"https:\/\/academic.oup.com\/jscr\/article\/doi\/10.1093\/jscr\/rjag667\/8748583"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,7]]},"references-count":14,"journal-issue":{"issue":"7","published-print":{"date-parts":[[2026,7,4]]}},"URL":"https:\/\/doi.org\/10.1093\/jscr\/rjag667","relation":{},"ISSN":["2042-8812"],"issn-type":[{"value":"2042-8812","type":"electronic"}],"subject":[],"published-other":{"date-parts":[[2026,7]]},"published":{"date-parts":[[2026,7]]},"article-number":"rjag667"}}