Table 1 A summary of the 13 cases of ectopic thymoma in the paratracheal region

Age (mean, range)

59.2 (42–71)

Gender, M/F

5/8

Symptoms, ±

2/11

Myasthenia gravis, ±

2/11

X-p/CT/PET

10/1/1

Tumor size (cm, mean, range)

5.2 (2.0–7.5)

Paratracheal site rt/lt

13/0

Preoperative diag.

Benign/malignant

9/4

WHO classification A/AB/B1/B2/B3/C

2/9/1/0/1/0

Masaoka stage^a I/II/III/IVa/IVb

6/5/0/0/0