Table 2.
Classification of thymic disorders according to the imaging appearance
| Appearance/size of thymus | Diseases |
| Small thymus | Physiological |
| Age related involution | |
| Treatment related atrophy | |
| Ectopic thymus | |
| Immunodeficiency disorders | |
| Hypoplasia | |
| Aplasia | |
| Large thymus | Hyperplasia |
| True hyperplasia | |
| Follicular hyperplasia | |
| Masses | |
| Cystic | |
| Thymic cyst | |
| Lymphatic malformation | |
| Germ cell tumor | |
| Solid | |
| Mild/moderate enhancement | |
| Lymphoma | |
| Thymoma | |
| Thymolipoma | |
| Thymic carcinoma | |
| Intense enhancement | |
| Hemangioma | |
| Castleman’s disease | |
| Thymic carcinoid | |
| Mixed | |
| Infections (abscess/ tuberculosis) | |
| Germ cell tumor | |
| Langerhans cell histiocytosis |