Table 1 Patient characteristics

Total

30

Median age (range)

53 (37–61)

Gender

Male

15 (50)

Female

15 (50)

Tumor location

Left lobe

18 (60)

Right lobe

11 (36.7)

Isthmus

1 (3.3)

Tumor size (cm)

≤ 2

3 (10)

2–4

15 (50)

> 4

7 (23.3)

Unknown

5 (16.7)

Lymph node metastasis

Present

15 (50.0)

Absent

14 (46.6)

Unknown

1 (3.3)

Location of Lymph node(n = 15)

Lateral

7 (46.6)

Central

8 (53.4)

Tumor extension

Present

21 (70)

Absent

7 (23.3)

Unknown

2 (6.7)

STE (n = 21)

RLN

8 (38.1)

Muscles

6 (28.6)

Esophagus

3 (14.3)

Great vessels

4 (19)

Trachea

2 (9.5)

Thymus

1 (4.7)

Parathyroid gland

1 (4.7)