Table 1.
Sensitivity of CT staging of middle ear cholesteama with surgical and CT findings.
| Classification | CT | Surgery | Sensitivity of CT staging |
|---|---|---|---|
| Tympanic cavity involvement (T): | |||
| T1: Attic cholesteatoma | 11 | 11 | |
| T2: Tympanic cholesteatoma | 13 | 12 | 85% |
| T3: Atticotympanic cholesteatoma | 37 | 38 | |
|
| |||
| Mastoid cavity involvement (M): | |||
| M0: No mastoid cavity involvement | 16 | 14 | |
| M1: Cholesteatoma extending into the mastoid antrum | 25 | 25 | 79% |
| M2: Cholesteatoma extending into the mastoid air cells | 20 | 22 | |
|
| |||
| Complications (C): | |||
| C0: Uncomplicated Cholesteatoma | 50 | 50 | |
| C1: Extracranial complications | 6 | 6 | 100% |
| C2: Intracranial complications | 5 | 5 | |