Table 5. Distribution of primary tumor sites.
| Site | n |
|---|---|
| Lateral nasal wall/medial maxillary sinus | 45 |
| Nasal cavity | 15 |
| Ethmoid sinus | 24 |
| Maxillary sinus | 25 |
| Frontal sinus | 8 |
| Sphenoid sinus | 2 |
| Septum | 2 |
| Unknown | 8 |
| Total | 129 |
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