Table 2. Masaoka stage with reference to the WHO histologic classification system for thymic epithelial tumors.
|
WHO tumour types
|
|||||||
|---|---|---|---|---|---|---|---|
| Stage | A | AB | B1 | B2 | B3 | C | Total |
| I | 5 (6.4) | 28 (35.9) | 12 (15.4) | 20 (25.6) | 10 (12.8) | 3 (3.8) | 78 |
| II | 2 (5.3) | 9 (2.4) | 10 (26.3) | 7 (18.4) | 6 (15.8) | 4 (10.5) | 38 |
| III | 2 (4.9) | 0 (0.0) | 2 (4.9) | 9 (22.0) | 12 (29.3) | 16 (39.0) | 41 |
| IV | 0 (0.0) | 0 (0.0) | 5 (13.2) | 12 (31.6) | 12 (31.6) | 9 (23.7) | 38 |
| Total | 9 (4.6) | 37 (19.0) | 29 (14.9) | 48 (24.6) | 40 (20.5) | 32 (16.4) | 195 |
Abbreviation: WHO=World Health Organisation.