| Type of lesion | Count | Percentage |
| Thymoma | 5 | 16.1 |
| Invasive thymoma | 1 | 3.2 |
| Thymic carcinoma | 1 | 3.2 |
| Hemorrhagic thymic cyst | 1 | 3.2 |
| Multinodular goiter | 3 | 9.7 |
| Thyroid lymphoma | 1 | 3.2 |
| Lymphoma | 10 | 32.3 |
| Germ cell tumor | 5 | 16.1 |
| Bronchogenic carcinoma lympadenopathy | 2 | 6.5 |
| Metastases | 1 | 3.2 |
| Granulocytic sarcoma | 1 | 3.2 |