{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,21]],"date-time":"2026-05-21T13:51:22Z","timestamp":1779371482891,"version":"3.53.1"},"reference-count":10,"publisher":"BMJ","issue":"5","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Case Rep"],"accepted":{"date-parts":[[2019,5,15]]},"published-print":{"date-parts":[[2019,5]]},"abstract":"<jats:p>Esthesioneuroblastoma is an uncommon tumour, and isolated primary involvement of the maxillary sinus is exceedingly rare. Esthesioneuroblastoma has infrequently been reported as a source of paraneoplastic ectopic hormone production. We report a case of isolated primary maxillary esthesioneuroblastoma, presenting as idiopathic syndrome of inappropriate antidiuretic hormone (SIADH). A 17-year-old girl presented with symptoms consistent with SIADH and no sino-nasal symptoms. MRI to exclude pituitary tumour revealed an isolated lesion of the right maxillary sinus. Biopsy demonstrated esthesioneuroblastoma. The lesion was removed endoscopically as a single en bloc specimen. Following resection, the sodium level returned to normal. This is only the third report in the literature of a primary maxillary esthesioneuroblastoma presenting as SIADH.<\/jats:p>","DOI":"10.1136\/bcr-2018-228666","type":"journal-article","created":{"date-parts":[[2019,5,29]],"date-time":"2019-05-29T06:48:02Z","timestamp":1559112482000},"page":"e228666","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":12,"title":["Isolated primary maxillary sinus esthesioneuroblastoma presenting as idiopathic syndrome of inappropriate antidiuretic hormone"],"prefix":"10.1136","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5799-5083","authenticated-orcid":false,"given":"Eugene","family":"Wong","sequence":"first","affiliation":[{"name":"Department of Otolaryngology, University of Sydney Westmead Clinical School, Sydney, New South Wales, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Siamak","family":"Choroomi","sequence":"additional","affiliation":[{"name":"Department of Otolaryngology, University of Sydney Westmead Clinical School, Sydney, New South Wales, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Carsten E","family":"Palme","sequence":"additional","affiliation":[{"name":"Department of Otolaryngology, University of Sydney Westmead Clinical School, Sydney, New South Wales, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Narinder Pal","family":"Singh","sequence":"additional","affiliation":[{"name":"Department of Otolaryngology, Head and Neck Surgery, Westmead Hospital, Sydney, New South Wales, 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