Table 1 Demographics and clinical features of patients with PC

Gender (male)

21

16

5

Current or ex-smoker

7

4

3

Clinical symptoms

Cough

6

4

2

Sputum

6

4

2

Chest pain

4

2

2

Chest distress

3

2

1

Hemoptysis

1

1

0

Fever

1

0

1

Comorbidities

Malignancy

8

0

8

Environmental exposures

2

2

0

Diabetes mellitus

2

0

2

History of tuberculosis

1

0

1

History of organ transplantation

1

0

1

Diagnosis by

Surgery

38

29

9

Percutaneous translung biopsy

1

0

1

Type of surgery

Wedge resection

22

18

4

Lobectomy

14

10

4

Segmentectomy

3

1

2

Initial diagnosis before surgery

Primary lung cancer

20

18

2

Pulmonary metastasis

5

0

5

Non-specific granulomatous disease

6

5

1

Pulmonary tuberculosis

2

2

0

Infectious disease

2

2

0

Benign lesions

9

7

2

Pulmonary cryptococcosis

1

0

1

Hamartoma

2

2

0