Nasal and Sinonasal Findings in Behçet's Syndrome: A Scoping Review.

Background: Nasal and sinonasal findings have been reported in patients with Behçet's syndrome, but their frequency, clinical significance, and relationship to underlying disease remain unclear. We performed a scoping review to map the published literature on epidemiology, clinical characteristics, and management. Methods: Following PRISMA-ScR guidance, we systematically searched MEDLINE, EMBASE, and Web of Science from inception through June 2026 for peer-reviewed primary studies reporting nasal or sinonasal findings in patients with Behçet's syndrome. Two reviewers independently screened studies and extracted data. Results: Fifteen eligible studies, including seven case reports and eight observational studies, were identified. Reported frequencies of nasal or sinonasal findings varied substantially across studies. A spectrum of nasal and sinonasal symptoms was noted among the literature, including direct mucosal lesions, sinonasal symptoms and functional abnormalities such as olfactory impairment or delayed mucociliary clearance, and secondary nasal conditions occurring in patients with Behçet's syndrome. Oral ulcers were consistently reported in the limited studies describing associated systemic features. Treatment data were sparse, and no evidence-based management approach specific to nasal disease was identified. Conclusions: The published literature suggests that a range of nasal and sinonasal findings may occur in patients with Behçet's syndrome. However, the available evidence is sparse, heterogeneous, and insufficient to determine true prevalence, attribution, or optimal management. Future studies should distinguish direct Behçet-related nasal lesions from secondary or nonspecific findings and use standardized clinical assessment.