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Table 2 Basic and clinical characteristics of the patients in present study (n = 23)

From: Stereotactic body radiation therapy for post-pulmonary lobectomy isolated lung metastasis of thoracic tumor: survival and side effects

Characteristics Number of patients (%)
Age (years)  
  Median (range) 58 (45–74)
Gender  
  Male/Female 17 (73.9)/6 (26.1)
ECOG a performance status  
  0-1 21 (91.3)
  2 2 (8.7)
Pathology of the primary tumor  
  Squamous-cell lung cancer 10 (43.5)
  Non-squamous cell lung cancer 10 (43.5)
  Sarcomatoid carcinoma 2 (8.7)
  Small cell lung cancer 1 (4.3)
Surgical method  
Right upper lung lobectomy 9 (39.1)
Right lower lung lobectomy 3 (13.0)
Left upper lung lobectomy 5 (21.7)
Left lower lung lobectomy 4 (17.4)
Left pneumonectomy 2 (8.7)
T staging after surgery b  
  T1/T2/T3/T4 3 (13.0)/11 (47.8)/8 (34.8)/1(4.3)
N staging after surgery b  
  N0/N1/N2 10 (43.5)/6 (26.1)/7 (30.4)
Tumor stage after surgery b  
  I 6 (26.1)
  II 9 (39.1)
  III 8 (34.8)
Time from surgery to lung metastasis (months)  
Median (range) 16.0 (4.0-75.0)
Sites of lung metastasis  
Contralateral lung of the primary tumor 12 (52.2)
Ipsilateral lung of the primary tumor 11 (47.8)
Follow-up time since diagnosis of lung metastasis (months)  
Median (range) 14.0 (6.0-47.0)
  1. a: Eastern Cooperative Oncology Group; b: staging system, 6th edition, American Joint Committee on Cancer, 2002.