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Factors associated with chronic sinusitis.
| Environmental factors |
| Bacteria, viruses, fungi |
| Pollution, smoking |
| Allergens, chemical exposures |
| Host factors |
| Atopy |
| Immune deficiency |
| Genetic – Cystic fibrosis, ciliary dyskinesia, etc. |
| Innate immunity – bitter taste receptors |
| Local factors |
| Anatomic abnormalities |
| Inflammation of underlying bone |
| Obstructing tumors |
| Chronic mucosal inflammation |
