CT patterns of focal hyperostosis in inverted papilloma
| Sites Having Areas of Hyperostosis | Cone-Shaped Hyperostosis on CT (n) | Plaque-Like Hyperostosis on CT (n) |
|---|---|---|
| Lateral nasal wall | 0 | 25* |
| Maxillary sinus | 6 | 5 |
| Anterior ethmoid sinus | 0 | 12† |
| Frontal sinus | 2 | 0 |
| Sphenoid sinus | 2 | 1 |
| Posterior ethmoid sinus | 1 | 0 |
| Septum | 1 | 0 |
* Four of the lesions proved not to coincide with the origin of tumor.
† Two of the lesions proved not to coincide with the origin of tumor.