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| WHO type | Masaoka-Koga staging |
Subtotal | |||
|---|---|---|---|---|---|
| I (n=63) | II (n=32) | III (n=32) | IV (n=11) | ||
| Thymoma | 59 | 28 | 13 | 5 | 105 |
| A | 5 | 3 | 1 | 0 | 9 |
| AB | 27 | 10 | 0 | 0 | 37 |
| B1 | 8 | 4 | 3 | 0 | 15 |
| B2 | 10 | 7 | 4 | 2 | 23 |
| B3 | 5 | 3 | 5 | 3 | 16 |
| Micronodular thymoma | 3 | 0 | 0 | 0 | 3 |
| Metaplastic thymoma | 1 | 1 | 0 | 0 | 2 |
| Thymic carcinoid | 2 | 1 | 2 | 1 | 6 |
| Thymic carcinoma | 2 | 3 | 17 | 5 | 27 |
