Table 4 Pathological diagnosis of lesions suspected to invade surrounding tissues

Sizes of primary lesions (mm)

50.95 ± 12.75

Anatomical sites of primary lesions (n)

 Mediastinum

17

  Anterior

12

  Posterior

1

  Upper anterior

2

  Anterior + Posterior

2

 Lung

2

  LUL

1

  LLL

1

Pathological type (n)

 Thymoma

8

  B1

2

  B1 + B2

1

  B2

4

  B3

1

 Thymic carcinoma

3

 Hodgkin lymphoma

2

 Thymic Cyst + Ganglioneuroma

1

 Tuberculosis

1

 Bronchogenic cyst

1

 Sclerosing lung cell tumor

1

 Pulmonary abscess

1

 Mature teratoma

1

Invaded site (n)

 Mediastinum

2

  Anterior

1

  Posterior

1

 Lung

17

  LUL

6

  LLL

1

  RUL

6

  RLL

3

  LLL + LUL

1

Invasion confirmed by biopsy (n)

11