{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,17]],"date-time":"2026-04-17T16:15:58Z","timestamp":1776442558135,"version":"3.51.2"},"reference-count":41,"publisher":"BMJ","issue":"4","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Case Rep"],"accepted":{"date-parts":[[2025,12,12]]},"published-print":{"date-parts":[[2026,4]]},"abstract":"<jats:p>The clinical presentation of gastrointestinal stromal tumours (GISTs) can vary and can be attributed to tumour mass effect or gastrointestinal haemorrhage. We present the rare case of a female in her 50s who presented with an adnexal mass on transvaginal ultrasound, eventually resulting in the resection of a small bowel GIST following diagnostic laparoscopy. A literature review revealed only 26 individual case reports of GISTs initially presenting as gynaecological disease. Mobility of the small bowel and a large-sized tumour promote descension of a mass towards the pelvis. This, along with their non-specific features on imaging, can result in them mimicking gynaecological pathology, prompting initial gynaecological investigation and a delay in surgical management. Non-gynaecological tumours, such as GISTs, must always be considered as a differential diagnosis in patients presenting with pelvic masses or pain.<\/jats:p>","DOI":"10.1136\/bcr-2025-270054","type":"journal-article","created":{"date-parts":[[2026,4,17]],"date-time":"2026-04-17T15:35:12Z","timestamp":1776440112000},"page":"e270054","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":0,"title":["Gastrointestinal stromal tumour of the small intestine presenting as an adnexal mass on\u2009transvaginal ultrasound"],"prefix":"10.1136","volume":"19","author":[{"given":"Siji","family":"Olusola","sequence":"first","affiliation":[{"name":"Surgery, Royal Free Hospital, London, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ayo","family":"Oshowo","sequence":"additional","affiliation":[{"name":"General Surgery, Whittington Hospital NHS Trust, London, 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