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Findings on preoperative HRCT temporal bone
| HRCT findings | Number of patients | Percentage |
|---|---|---|
| Non enhancing soft tissue density lesion in the tympanic cavity, aditus and antrum | 24 | 96 |
| Enhancing soft tissue density lesion in the tympanic cavity, aditus and antrum | 1 | 4 |
| Ossicular erosion | 24 | 96 |
| Lateral semicircular canal erosion with fistula | – | – |
| Tegmen tympani erosion | 2 | 8 |
| Sinus plate erosion | 1 | 4 |
| Facial canal erosion | 1 | 4 |
| Jugular foramen widening | 1 | 4 |
| Erosion of anterior wall of the middle ear | 1 | 4 |
