{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,31]],"date-time":"2025-12-31T15:51:09Z","timestamp":1767196269053,"version":"3.48.0"},"reference-count":17,"publisher":"BMJ","issue":"12","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Case Rep"],"accepted":{"date-parts":[[2025,12,14]]},"published-print":{"date-parts":[[2025,12]]},"abstract":"<jats:p>A chronic expanding haematoma is characterised by progressive enlargement over months to years and can develop in various locations. Herein, we report a surgically resected chronic expanding haematoma from the left thoracic outlet, which was caused by rib fractures owing to a late-phase complication of radiation therapy for pulmonary metastasis. A man in his 60s, who had undergone multiple lung resections and radiation therapy, presented with left shoulder pain and left-hand numbness. The imaging studies revealed a space-occupying mass and old rib fractures in the irradiated area; the needle biopsy determined it was a haematoma. Subsequently, we resected the haematoma and achieved haemostasis via a supraclavicular approach without the need for rib resection. The patient\u2019s neurological symptoms were relieved immediately after surgery, and haematoma regrowth was not observed 1 year after surgery.<\/jats:p>","DOI":"10.1136\/bcr-2025-268331","type":"journal-article","created":{"date-parts":[[2025,12,31]],"date-time":"2025-12-31T15:45:17Z","timestamp":1767195917000},"page":"e268331","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":0,"title":["Chronic expanding haematoma caused by rib fractures after radiation therapy"],"prefix":"10.1136","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0009-0006-0683-0234","authenticated-orcid":false,"given":"Sodai","family":"Nagata","sequence":"first","affiliation":[{"name":"Department of Thoracic Surgery, The University of Tokyo Hospital, Tokyo, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8076-0821","authenticated-orcid":false,"given":"Yue","family":"Cong","sequence":"additional","affiliation":[{"name":"Department of Thoracic Surgery, The University of Tokyo Hospital, Tokyo, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gouji","family":"Toyokawa","sequence":"additional","affiliation":[{"name":"Department of Thoracic Surgery, The University of Tokyo Hospital, Tokyo, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Masaaki","family":"Sato","sequence":"additional","affiliation":[{"name":"Department of Thoracic Surgery, The University of Tokyo Hospital, Tokyo, 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