{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,26]],"date-time":"2026-06-26T15:51:18Z","timestamp":1782489078632,"version":"3.54.5"},"reference-count":19,"publisher":"BMJ","issue":"4","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Case Rep"],"accepted":{"date-parts":[[2026,3,12]]},"published-print":{"date-parts":[[2026,4]]},"abstract":"<jats:p>In this case report, we present a case of a woman in her 30s who was diagnosed with thoracic endometriosis presenting as a large pulmonary mass. Hormonal treatment progestin (synthetic form of progesterone) was started. The patient was deemed technically inoperable due to anatomical constraints.<\/jats:p>\n                  <jats:p>Follow-up CT showed little change in the lesion\u2019s size but revealed central cavitation within the lesion due to its connection to a posterobasal bronchus presenting an additional therapeutic dilemma.<\/jats:p>\n                  <jats:p>This case highlights the diagnostic and treatment challenges associated with atypical thoracic masses that mimic malignant tumours particularly in the context of inoperable patients.<\/jats:p>","DOI":"10.1136\/bcr-2025-271732","type":"journal-article","created":{"date-parts":[[2026,4,2]],"date-time":"2026-04-02T16:05:22Z","timestamp":1775145922000},"page":"e271732","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":0,"title":["Thoracic endometriosis in an inoperable patient"],"prefix":"10.1136","volume":"19","author":[{"given":"Anna 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