Table 2.
Structures altered by otosclerosis.
| Case | Categories of Pathology | |||||
|---|---|---|---|---|---|---|
| All bone between UBTC and FNC and endosteum of both UBTC and FNC | Bone adjacent to FNC and FNC endosteum | IAC | Modiolus | RW obliteration | Cochlear endosteum | |
| 1 | − | + | − | − | − | + |
| 2 | − | + | + | − | − | + |
| 3 | + | − | + | − | − | + |
| 4 | − | − | − | − | − | − |
| 5 | − | − | − | − | − | − |
| 6 | + | − | + | + | + | + |
| 7 | + | − | + | − | − | + |
| 8 | + | − | + | − | + | + |
| 9 | + | − | + | + | + | + |
| 10 | − | − | + | − | − | + |
| 11 | + | − | + | + | − | + |
| 12 | − | + | − | − | − | + |
| 13 | − | − | + | + | − | + |
UBTC: upper basal turn of the cochlea; FNC: facial nerve canal; IAC: internal auditory canal; RW: round window