{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,19]],"date-time":"2025-12-19T08:50:12Z","timestamp":1766134212629,"version":"3.48.0"},"reference-count":13,"publisher":"BMJ","issue":"12","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Case Rep"],"accepted":{"date-parts":[[2025,12,1]]},"published-print":{"date-parts":[[2025,12]]},"abstract":"<jats:p>We report the case of a teenaged girl presenting with progressive orthopnoea, exertional dyspnoea, non-radiating right-sided chest pain and loss of appetite, for the last 6 months. Chest radiograph revealed complete opacification of the right hemithorax with contralateral tracheo-mediastinal shift. A contrast-enhanced CT scan of the thorax showed a massive fat-containing anterior mediastinal mass extending into both hemithoraces, without invasion of adjacent structures. Ultrasound-guided biopsy of the lesion suggested a neoplastic aetiology of thymic origin. Based on the clinicoradiological and pathological findings, a provisional diagnosis of thymolipoma was made. The mass was completely excised via a midline sternotomy approach. Postoperative histopathology confirmed the diagnosis as thymolipoma. After surgical excision of the tumour, the patient showed complete clinicoradiological improvement and is asymptomatic at 3-year follow-up.<\/jats:p>","DOI":"10.1136\/bcr-2025-269800","type":"journal-article","created":{"date-parts":[[2025,12,19]],"date-time":"2025-12-19T08:40:15Z","timestamp":1766133615000},"page":"e269800","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":0,"title":["Unilateral white-out lung: thoracic thymolipoma"],"prefix":"10.1136","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0009-0008-6459-6479","authenticated-orcid":false,"given":"Aswathy","family":"Sabu","sequence":"first","affiliation":[{"name":"Pulmonary Medicine, All India Institute of Medical Sciences, Rishikesh, Uttarakhand, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1088-7517","authenticated-orcid":false,"given":"Abisho R","family":"Starlet","sequence":"additional","affiliation":[{"name":"CTVS, All India Institute of Medical Sciences, Rishikesh, Uttarakhand, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7982-6267","authenticated-orcid":false,"given":"Mayank","family":"Mishra","sequence":"additional","affiliation":[{"name":"Pulmonary Medicine, All India Institute of Medical Sciences, Rishikesh, Uttarakhand, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4524-2359","authenticated-orcid":false,"given":"Anshuman","family":"Darbari","sequence":"additional","affiliation":[{"name":"CTVS, All India Institute of Medical Sciences, Rishikesh, Uttarakhand, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yash","family":"Jain","sequence":"additional","affiliation":[{"name":"Pulmonary Medicine, All India Institute of Medical Sciences, New Delhi, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7241-7428","authenticated-orcid":false,"given":"Prakash","family":"Sivaramakrishnan","sequence":"additional","affiliation":[{"name":"Pulmonary Medicine, All India Institute of Medical Sciences, Rishikesh, Uttarakhand, India"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2025,12,18]]},"reference":[{"key":"2025121900400881000_18.12.e269800.1","doi-asserted-by":"crossref","DOI":"10.1016\/j.ijscr.2025.111299","article-title":"Giant anterior mediastinal thymolipoma: A rare case of thoracoscopic resection and surgical management challenges","volume":"130","author":"Bessrour","year":"2025","journal-title":"Int J Surg Case Rep"},{"key":"2025121900400881000_18.12.e269800.2","doi-asserted-by":"crossref","first-page":"1780","DOI":"10.1016\/S0022-3468(97)90534-0","article-title":"A case of massive thymolipoma","volume":"32","author":"Gregory","year":"1997","journal-title":"J Pediatr Surg"},{"key":"2025121900400881000_18.12.e269800.3","doi-asserted-by":"crossref","first-page":"1137","DOI":"10.12998\/wjcc.v11.i5.1137","article-title":"Surgical resection of a giant thymolipoma causing respiratory failure: A case report","volume":"11","author":"Gong","year":"2023","journal-title":"World J Clin Cases"},{"key":"2025121900400881000_18.12.e269800.4","doi-asserted-by":"crossref","unstructured":"Darbari A , Dutt B , Kumar A , et al . 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