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Jahrsdoerfer classification.
| CT Findings | Score |
|---|---|
| Stapes present | 2 |
| Middle ear space | 1 |
| Oval window open | 1 |
| Facial nerve normal | 1 |
| Malleus-incus complex present | 1 |
| Mastoid well-pneumatized | 1 |
| Incus-stapes connection | 1 |
| Round window normal | 1 |
| Appearance of external ear | 1 |
