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We sought to assess and compare the treatment practice of sinonasal tumours across the Nordic countries.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Methods<\/jats:title>\n                <jats:p>A web-based questionnaire was sent to all university hospital departments of otorhinolaryngology\u2014head and neck surgery in the Nordic countries.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>Answers were obtained from all 21 Nordic university hospitals. The endoscopic approach was widely utilised by all, with most (62%) centres reporting 3\u20134 surgeons performing endoscopic sinonasal tumour surgery. Finland reported the lowest rates of centralisation among university hospitals despite having the highest number of 0.1\u20131 M catchment population hospitals. Most centres (88%) opted for the endoscopic approach in a patient case warranting\u00a0medial maxillectomy. In a case of a Kadish C esthesioneuroblastoma, most (52%) of the centres preferred an endoscopic approach. Most centres (62%) reported favouring the endoscopic approach in a case describing a juvenile angiofibroma. Regarding a case describing a sinonasal undifferentiated carcinoma, consensus was tied (38% vs. 38%) between endoscopic resection followed by postoperative (chemo)radiotherapy (RT\/CRT) and induction chemotherapy followed by RT\/CRT or surgery followed by RT\/CRT.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusion<\/jats:title>\n                <jats:p>Endoscopic approach was widely utilised in the Nordic countries. The case-based replies showed differences in treatment practice, both internationally and nationally. The rate of centralisation among university hospitals remains relatively low, despite the rarity of these tumours.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1007\/s00405-023-08229-w","type":"journal-article","created":{"date-parts":[[2023,9,21]],"date-time":"2023-09-21T15:02:20Z","timestamp":1695308540000},"page":"785-794","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Endoscopic management of sinonasal tumours in the Nordic university hospitals: a survey"],"prefix":"10.1007","volume":"281","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9246-0431","authenticated-orcid":false,"given":"Carl","family":"Korsstr\u00f6m","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1781-1718","authenticated-orcid":false,"given":"Markus","family":"Lilja","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1660-9737","authenticated-orcid":false,"given":"Lalle","family":"Hammarstedt-Nordenvall","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0451-2404","authenticated-orcid":false,"given":"Antti","family":"M\u00e4kitie","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3097-1118","authenticated-orcid":false,"given":"Aaro","family":"Haapaniemi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2023,9,21]]},"reference":[{"key":"8229_CR1","doi-asserted-by":"publisher","first-page":"111","DOI":"10.1017\/S0022215116000530","volume":"130","author":"VJ Lund","year":"2016","unstructured":"Lund VJ, Clarke PM, Swift AC et al (2016) Nose and paranasal sinus tumours: United Kingdom National Multidisciplinary Guidelines. 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