北欧国家（共27个）都有相当的公费医疗系统，鼻窦肿瘤的管理集中在21所大学医院。我们试图评估和比较北欧国家对鼻窦肿瘤的治疗实践。我们向北欧国家的所有大学医院耳鼻喉头颈外科部门发送了一个基于网络的问卷调查。我们得到了来自所有21所北欧大学医院的答案。所有医院普遍采用内窥镜手术方法，其中大多数（62%）医院报告称有3-4名医生进行内窥镜鼻窦肿瘤手术。芬兰报告的大学医院集中率最低，尽管其收治人口在0.1-1百万之间的医院数量最多。大多数医院（88%）选择内窥镜手术方法进行适用于鼻中腭切除的病例。对于Kadish C型神经母细胞瘤的病例，大多数医院（52%）倾向选择内窥镜手术方法。在描述少年纤维血管瘤病例时，大多数医院（62%）报告倾向于选择内窥镜手术方法。对于描述不分化的鼻窦癌病例，医院之间的共识（38% vs. 38%）倾向于内窥镜切除后进行术后（化）放疗或先行化疗后进行（化）放疗或手术后进行（化）放疗。内窥镜手术方法在北欧国家被广泛使用。基于病例的回答显示了国际和国内治疗实践的差异。尽管这种肿瘤很罕见，大学医院的集中率仍然相对较低。© 2023. The Author(s).

The Nordic countries (27 M) all have comparable, publicly funded healthcare systems, and the management of sinonasal tumours is centralised to the 21 university hospitals. We sought to assess and compare the treatment practice of sinonasal tumours across the Nordic countries.A web-based questionnaire was sent to all university hospital departments of otorhinolaryngology-head and neck surgery in the Nordic countries.Answers were obtained from all 21 Nordic university hospitals. The endoscopic approach was widely utilised by all, with most (62%) centres reporting 3-4 surgeons performing endoscopic sinonasal tumour surgery. Finland reported the lowest rates of centralisation among university hospitals despite having the highest number of 0.1-1 M catchment population hospitals. Most centres (88%) opted for the endoscopic approach in a patient case warranting medial 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.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.© 2023. The Author(s).