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Persistent symptoms prompted an MRI at 19 weeks\u2019 gestation, which revealed a mass expanding into the left internal iliac and left common iliac veins, as well as compression and invasion of the left distal ureter and associated obstructive uropathy to the level of the mass. This case highlights the diagnostic challenges and multidisciplinary management of the patient as well as the justification for supporting her wishes to continue with the pregnancy.<\/jats:p>","DOI":"10.1136\/bcr-2024-262204","type":"journal-article","created":{"date-parts":[[2025,3,19]],"date-time":"2025-03-19T16:20:48Z","timestamp":1742401248000},"page":"e262204","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":0,"title":["Managing concurrent endometrial stromal sarcoma during pregnancy"],"prefix":"10.1136","volume":"18","author":[{"given":"Sarah","family":"Black","sequence":"first","affiliation":[{"name":"University of Dundee School of Medicine, Dundee, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kalpana","family":"Ragupathy","sequence":"additional","affiliation":[{"name":"Undergraduate Medicine, School of Medicine, University of Dundee College of Medicine Dentistry and Nursing, Dundee, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kirsty","family":"McNeil","sequence":"additional","affiliation":[{"name":"School of Medicine, NHS Tayside, Dundee, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Binita","family":"Pande","sequence":"additional","affiliation":[{"name":"Ninewells Hospital and Medical School, Dundee, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jamie","family":"Wilson","sequence":"additional","affiliation":[{"name":"Ninewells Hospital and Medical School, Dundee, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Caitlin","family":"Finnan","sequence":"additional","affiliation":[{"name":"Ninewells Hospital and Medical School, Dundee, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2025,3,19]]},"reference":[{"key":"2025082701433305000_18.3.e262204.1","doi-asserted-by":"crossref","first-page":"51","DOI":"10.1002\/ijgo.12613","article-title":"Uterine sarcomas","volume":"143 Suppl 2","author":"Mbatani","year":"2018","journal-title":"Int J Gynaecol Obstet"},{"key":"2025082701433305000_18.3.e262204.2","doi-asserted-by":"publisher","DOI":"10.1038\/sj.bjc.6604527"},{"key":"2025082701433305000_18.3.e262204.3","doi-asserted-by":"crossref","first-page":"383","DOI":"10.1097\/PAP.0000000000000046","article-title":"Endometrial stromal tumors: the new WHO classification","volume":"6","author":"Conklin","year":"2014","journal-title":"Adv Anatomy Pathol"},{"key":"2025082701433305000_18.3.e262204.4","first-page":"1","article-title":"An unusual presentation and behaviour of endometrial stromal sarcoma","volume":"2","author":"Adibah","year":"2006","journal-title":"Int Med J"},{"key":"2025082701433305000_18.3.e262204.5","unstructured":"Matalliotakis M , Velegrakis A , Koliarakis I , et al . 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