| Neoplastic |
Infectious |
Vascular |
1. Thyroid
Substernal goitre
Ectopic thyroid tissue |
Acute descending necrotizing mediastinitis- Bacterial |
Aneurysm of the aortic arch with projection in the anterior mediastinum |
2. Thymus
Thymic hyperplasia
Thymoma
Thymic carcinoma
Thymic carcinoid
Thymic cyst
Thymolipoma |
Subacute
Fungal
Mycobacterial
Histoplasma
Actinomycosis |
Innominate vein aneurysm |
3. Teratoma
Mature
Immature
With malignant component |
|
Superior vena cava aneurysm |
4. Germ cell tumors
Seminoma
Yolk sac tumours
Embyonal Carcinoma
Choriocarcinoma |
|
Dilation of the superior vena cava (with anomalous pulmonary venous return |
5. Lymphoma
Hodgkin’s
Non-hodgkin’s |
|
Persistent left superior vena cava |
| 6. Ectopic parathyroid with adenoma |
|
|
| 7. Lipoma/Liposarcfoma |
|
|
| 8. Fibroma/Fibrosarcoma |
|
|
