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Further interventions included angioplasty and stent realignment, followed by anticoagulation. This case highlights the complexities of managing SVC syndrome and emphasises the potential for recurrent thrombosis.<\/jats:p>","DOI":"10.1136\/bcr-2025-266865","type":"journal-article","created":{"date-parts":[[2025,10,8]],"date-time":"2025-10-08T05:20:34Z","timestamp":1759900834000},"page":"e266865","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":0,"title":["Unusual presentation of superior vena cava syndrome secondary to breast cancer"],"prefix":"10.1136","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7284-7663","authenticated-orcid":false,"given":"Savannah Christine","family":"Roy","sequence":"first","affiliation":[{"name":"Hematology\/Oncology, Denver Health Medical Center, Denver, Colorado, USA"},{"name":"University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lisa","family":"Lui","sequence":"additional","affiliation":[{"name":"Radiology, Denver Health Medical Center, Denver, Colorado, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Christopher","family":"Doyle","sequence":"additional","affiliation":[{"name":"Radiology, Denver Health Medical Center, Denver, Colorado, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mary","family":"O\u2019Keefe","sequence":"additional","affiliation":[{"name":"Pathology, Denver Health Medical Center, Denver, Colorado, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3825-1852","authenticated-orcid":false,"given":"Sandhya","family":"Sharma","sequence":"additional","affiliation":[{"name":"Hematology\/Oncology, Denver Health Medical Center, Denver, Colorado, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2025,10,7]]},"reference":[{"key":"2025100722202056000_18.10.e266865.1","doi-asserted-by":"publisher","DOI":"10.1164\/ajrccm\/141.5_Pt_1.1114"},{"key":"2025100722202056000_18.10.e266865.2","first-page":"100161","article-title":"Superior vena cava syndrome and breast cancer: A case series highlighting a rare complication","volume":"6","author":"Poland","year":"2022","journal-title":"Curr Probl Cancer: Case Rep"},{"key":"2025100722202056000_18.10.e266865.3","doi-asserted-by":"crossref","first-page":"e147","DOI":"10.1308\/rcsann.2018.0074","article-title":"Chyle leak following an axillary sentinel lymph node biopsy for breast cancer in a patient with superior vena caval thrombosis - 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