Table 2 Histopathological tumor entities (n = 99)

Upper MTs

n = 6

 Neurinoma

5

 Lipoma

1

Anterior MTs

n = 99

 Cystic disease

34

 Thymoma

32

 Thymic cancer

8

 Germ cell tumor

5

 Neuroendocrine tumor

4

 Thymic hyperplasia

3

 Metastastic mediastinal lymph node

3

 Malignant lymphoma

3

 Lymph follicle hyperplasia

2

 Lymphangioma

1

 Peicaridial diverticulum

1

 Mediastinal goiter

1

 IgG4-related disease

1

 Ectopic mediastinal parathyoroid tumor

1

Middle MTs

n = 22

 Metastastic mediastinal lymph node

8

 Cystic disease

8

 Neurinoma

2

 Solitary fibrous tumor

1

 Liposarcoma

1

 Lymphangioma

1

 Epithelioid granuloblastoma

1

Posterior MTs

n = 4

 Neurinoma

2

 Cystic disease

1

 Metastastic mediastinal lymph node

1