Table 1.
Characteristics of congenital cholesteatoma according to stage
| Stage | No. of patients | Mean age (year) | Location | Type | Residual or recurrent |
|---|---|---|---|---|---|
| I | 16 | 3.7±2.9 | ASQ 11, PSQ 4, AIQ 1 | Closed 15, open 1 | 1 (6%) |
| II | 4 | 6.8±4.3 | ASQ+AIQ 2, PSQ+PIQ 1, AIQ+PIQ 1 | Closed 2, open 2 | 2 (50%) |
| III | 11 | 9.6±6.5 | ASQ 1, PSQ 6, PIQ 1, PSQ+PIQ 1, PSQ+AIQ+PIQ 1, all 1 | Closed 2, open 9 | 4 (36%) |
| IV | 7 | 11.6±5.8 | ASQ 1, PSQ 1, PIQ 1, PSQ+PIQ 1, ASQ+PSQ+PIQ 1, all 2 | Open 7 | 2 (29%) |
The average age and the ratio of open-type cholesteatoma are positively correlated with the stage.
ASQ: anterior superior quadrant; PSQ: posterior superior quadrant; AIQ: anterior inferior quadrant; PIQ: posterior inferior quadrant