Table 1.
Anterior | Middle | Posterior |
Thymoma | Lymphoma | Neurogenic tumour |
Teratoma, seminoma | Pericardial cyst | Bronchogenic cyst |
Lymphoma | Bronchogenic cyst | Enteric cyst |
Carcinoma | Metastatic cyst | Xanthogranuloma |
Parathyroid adenoma | Systemic granuloma | Diaphragmatic hernia |
Intrathoracic goitre | Meningocele | |
Lipoma | Paravertebral abscess | |
Lymphangioma | ||
Aortic aneurysm |