Table 1. Patients’ characteristics.

Characteristics	Total number (N=49)
Age (years)
Range	26–70
Median	49
Male/female	9/40
Chief complaint
No symptom	38
Dry cough	6
Cough with sputum	1
Chest pain	2
Chest distress	2
Comorbidity
Hypertension	3
Diabetes	1
Arrhythmia	1
Coronary heart disease	2
Hyperthyroidism	1
History of malignancy
Lung cancer	2
Melanoma	1
Cervical cancer	1
Smoking history
Yes	2
No	47
Synchronous multiple lesions
Yes	19
No	30