{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,6]],"date-time":"2026-01-06T05:20:35Z","timestamp":1767676835344,"version":"3.44.0"},"reference-count":10,"publisher":"BMJ","issue":"5","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Case Rep"],"accepted":{"date-parts":[[2021,4,28]]},"published-print":{"date-parts":[[2021,5]]},"abstract":"<jats:p>Ameloblastoma (AM) in the maxillary sinus is rare. This benign entity shows locally invasive, destructive and aggressive behaviour and a high rate of recurrence. Therefore, the course of treatment is radical resection. We report the case of a 38-year-old man presenting with signs of recurrent sinusitis in the Ear, Nose and Throat Department. Transnasal flexible endoscopy revealed a cystic mass in the right inferior and middle nasal passage. CT scan showed an obliterated right maxillary sinus with a ballooning effect and pressure atrophy of the lateral sinus wall, without possible differentiation of the middle and low nasal turbinate. The patient was treated with transnasal functional sinus surgery; pathology stated AM. AM in the maxillary sinus is rare, locally destructive and therefore as a gold standard is resected radically to prevent recurrence. We demonstrate a conservative approach; explicitly, we combined a transvestibular and functional endoscopic sinus surgery resection of the AM to maintain function and reduce the possibility of postoperative impairments. Whether the strategy of treatment for AM is conservative, it nonetheless can result in a recurrence-free status. Nevertheless, inclusion into an oncological follow-up-programme with regularly performed MRI and CT is recommended.<\/jats:p>","DOI":"10.1136\/bcr-2020-241487","type":"journal-article","created":{"date-parts":[[2021,5,13]],"date-time":"2021-05-13T13:12:58Z","timestamp":1620911578000},"page":"e241487","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":5,"title":["Ameloblastoma of the maxillary sinus: conservative surgical management considering high recurrence risk potential"],"prefix":"10.1136","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9319-8260","authenticated-orcid":false,"given":"Lukas S","family":"Fiedler","sequence":"first","affiliation":[{"name":"Otorhinolaryngology and Head and Neck Surgery, Klinikum Mutterhaus der Borrom\u00e4erinnen gGmbH, Trier, Deutschland, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Annette","family":"Wunsch","sequence":"additional","affiliation":[{"name":"Otorhinolaryngology and Head and Neck Surgery, Klinikum Mutterhaus der Borrom\u00e4erinnen gGmbH, Trier, Deutschland, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2021,5,13]]},"reference":[{"key":"2025082708315773000_14.5.e241487.1","doi-asserted-by":"publisher","DOI":"10.1097\/MOO.0b013e32834e62ed"},{"key":"2025082708315773000_14.5.e241487.2","doi-asserted-by":"crossref","first-page":"402","DOI":"10.1016\/j.otorri.2009.05.002","article-title":"[Inverted sinonasal papillomas. Review of 61 cases]","volume":"60","author":"D\u00edaz Molina","year":"2009","journal-title":"Acta Otorrinolaringol Esp"},{"key":"2025082708315773000_14.5.e241487.3","doi-asserted-by":"crossref","first-page":"81","DOI":"10.1002\/cap.10083","article-title":"Sinus floor augmentation in presence of mucocele Eroding maxillary sinus wall: a case report with 3 years follow-up","volume":"10","author":"Medikeri","year":"2020","journal-title":"Clin Adv Periodontics"},{"key":"2025082708315773000_14.5.e241487.4","doi-asserted-by":"crossref","first-page":"43","DOI":"10.1016\/j.ijscr.2016.11.039","article-title":"Multi-recurrent invasive ameloblastoma: a surgical challenge","volume":"30","author":"Faras","year":"2017","journal-title":"Int J Surg Case Rep"},{"key":"2025082708315773000_14.5.e241487.5","first-page":"014556132093055","article-title":"Maxillary sinus ameloblastoma: transnasal endoscopic management","author":"Karp","year":"2020","journal-title":"Ear Nose Throat J"},{"key":"2025082708315773000_14.5.e241487.6","doi-asserted-by":"crossref","first-page":"247","DOI":"10.1007\/s12105-018-0933-3","article-title":"Sinonasal ameloblastoma","volume":"13","author":"Barrena","year":"2019","journal-title":"Head Neck Pathol"},{"key":"2025082708315773000_14.5.e241487.7","first-page":"S10","article-title":"Odontogenic tumors: where are we in 2017 ?","volume":"51","author":"Wright","year":"2017","journal-title":"J Istanb Univ Fac Dent"},{"key":"2025082708315773000_14.5.e241487.8","article-title":"[Ameloblastoma of the maxillary sinus treated with radiation therapy]","volume":"26","author":"Chehal","year":"2017","journal-title":"Pan Afr Med J"},{"key":"2025082708315773000_14.5.e241487.9","doi-asserted-by":"publisher","DOI":"10.1002\/hed.24720"},{"key":"2025082708315773000_14.5.e241487.10","doi-asserted-by":"crossref","first-page":"1649","DOI":"10.1007\/s00405-015-3631-8","article-title":"Ameloblastoma: a clinical review and trends in management","volume":"273","author":"McClary","year":"2016","journal-title":"Eur Arch Otorhinolaryngol"}],"container-title":["BMJ Case Reports"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/syndication.highwire.org\/content\/doi\/10.1136\/bcr-2020-241487","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,8,27]],"date-time":"2025-08-27T15:32:03Z","timestamp":1756308723000},"score":1,"resource":{"primary":{"URL":"https:\/\/casereports.bmj.com\/lookup\/doi\/10.1136\/bcr-2020-241487"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,5]]},"references-count":10,"journal-issue":{"issue":"5","published-online":{"date-parts":[[2021,5,13]]},"published-print":{"date-parts":[[2021,5]]}},"alternative-id":["10.1136\/bcr-2020-241487"],"URL":"https:\/\/doi.org\/10.1136\/bcr-2020-241487","relation":{},"ISSN":["1757-790X"],"issn-type":[{"type":"electronic","value":"1757-790X"}],"subject":[],"published":{"date-parts":[[2021,5]]}}}