{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,28]],"date-time":"2025-12-28T18:07:55Z","timestamp":1766945275892,"version":"3.44.0"},"reference-count":9,"publisher":"BMJ","issue":"4","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Case Rep"],"accepted":{"date-parts":[[2021,4,3]]},"published-print":{"date-parts":[[2021,4]]},"abstract":"<jats:p>A sinus pneumocele is a rare entity caused by obstruction of a paranasal sinus ostium. It is characterised by dilation and expansion of the sinus, with subsequent bony erosion. The most probable mechanism is air trapping in the paranasal sinus, via a one-way valve mechanism. The case presented concerns a 68-year-old Caucasian man, with recurrent episodes of acute rhinosinusitis. Clinical examination and subsequent imaging of the face, revealed a large pneumocele of the right frontal sinus that significantly eroded the posterior sinus wall. A large mucocele of the right maxillary sinus was also noted, extending to the middle meatus, causing full obstruction of the ostiomeatal complex. Endoscopic sinus surgery was performed, the mucocele was removed and the pneumatisation pathway of the frontal sinus was restored. The patient reports full resolution of symptoms and shows no evidence of recurrence, 6\u2009months postoperatively.<\/jats:p>","DOI":"10.1136\/bcr-2021-242477","type":"journal-article","created":{"date-parts":[[2021,4,23]],"date-time":"2021-04-23T10:53:10Z","timestamp":1619175190000},"page":"e242477","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":3,"title":["Frontal sinus pneumocele caused by a maxillary sinus mucocele"],"prefix":"10.1136","volume":"14","author":[{"given":"Spyridon","family":"Potamianos","sequence":"first","affiliation":[{"name":"1st Otorhinolaryngology Department, National and Kapodistrian University of Athens School of Medicine, Athens, Greece"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1806-7820","authenticated-orcid":false,"given":"Eftychia","family":"Kanioura","sequence":"additional","affiliation":[{"name":"1st Otorhinolaryngology Department, National and Kapodistrian University of Athens School of Medicine, Athens, Greece"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6734-0542","authenticated-orcid":false,"given":"Georgios","family":"Chrysovitsiotis","sequence":"additional","affiliation":[{"name":"1st Otorhinolaryngology Department, National and Kapodistrian University of Athens School of Medicine, Athens, Greece"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Evangelos","family":"Giotakis","sequence":"additional","affiliation":[{"name":"1st Otorhinolaryngology Department, National and Kapodistrian University of Athens School of Medicine, Athens, Greece"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2021,4,23]]},"reference":[{"doi-asserted-by":"publisher","key":"2025082701500174000_14.4.e242477.1","DOI":"10.1177\/0333102410378047"},{"key":"2025082701500174000_14.4.e242477.2","doi-asserted-by":"crossref","first-page":"602","DOI":"10.1288\/00005537-198705000-00013","article-title":"The abnormally large frontal sinus. 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A practical method for its determination based upon an analysis of 100 normal patients","volume":"97","author":"Urken","year":"1987","journal-title":"Laryngoscope"},{"doi-asserted-by":"publisher","key":"2025082701500174000_14.4.e242477.3","DOI":"10.3348\/kjr.2008.9.4.379"},{"key":"2025082701500174000_14.4.e242477.4","first-page":"2015","article-title":"Surgical correction of an extensive skull base defect as a result of pneumocele","volume":"95","author":"Ramprasad","year":"2016","journal-title":"Med"},{"doi-asserted-by":"publisher","key":"2025082701500174000_14.4.e242477.5","DOI":"10.1016\/j.jcms.2012.05.016"},{"key":"2025082701500174000_14.4.e242477.6","doi-asserted-by":"crossref","first-page":"418","DOI":"10.1097\/SCS.0000000000000694","article-title":"Pneumosinus dilatans: is it more than an aesthetic concern?","volume":"25","author":"Desai","year":"2014","journal-title":"J Craniofac Surg"},{"key":"2025082701500174000_14.4.e242477.7","doi-asserted-by":"crossref","first-page":"054","DOI":"10.1055\/s-0033-1347903","article-title":"A case of orbital emphysema associated with frontal sinus pneumocele","volume":"74","author":"Sasaki","year":"2013","journal-title":"J Neurol Surg Rep"},{"doi-asserted-by":"publisher","key":"2025082701500174000_14.4.e242477.8","DOI":"10.1620\/tjem.202.295"},{"key":"2025082701500174000_14.4.e242477.9","doi-asserted-by":"crossref","first-page":"1013","DOI":"10.1007\/s00266-018-1106-1","article-title":"Enlargement of frontal sinus, case report","volume":"42","author":"Andejani","year":"2018","journal-title":"Aesthetic Plast Surg"}],"container-title":["BMJ Case Reports"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/syndication.highwire.org\/content\/doi\/10.1136\/bcr-2021-242477","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,8,27]],"date-time":"2025-08-27T08:50:14Z","timestamp":1756284614000},"score":1,"resource":{"primary":{"URL":"https:\/\/casereports.bmj.com\/lookup\/doi\/10.1136\/bcr-2021-242477"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,4]]},"references-count":9,"journal-issue":{"issue":"4","published-online":{"date-parts":[[2021,4,23]]},"published-print":{"date-parts":[[2021,4]]}},"alternative-id":["10.1136\/bcr-2021-242477"],"URL":"https:\/\/doi.org\/10.1136\/bcr-2021-242477","relation":{},"ISSN":["1757-790X"],"issn-type":[{"type":"electronic","value":"1757-790X"}],"subject":[],"published":{"date-parts":[[2021,4]]}}}