Characteristics | Number of patients (%) |
---|---|
Age (years) | Â |
  Median (range) | 58 (45–74) |
Gender | Â |
  Male/Female | 17 (73.9)/6 (26.1) |
ECOG a performance status | Â |
  0-1 | 21 (91.3) |
  2 | 2 (8.7) |
Pathology of the primary tumor | Â |
  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 | Â |
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 | Â |
  T1/T2/T3/T4 | 3 (13.0)/11 (47.8)/8 (34.8)/1(4.3) |
N staging after surgery b | Â |
  N0/N1/N2 | 10 (43.5)/6 (26.1)/7 (30.4) |
Tumor stage after surgery b | Â |
  I | 6 (26.1) |
  II | 9 (39.1) |
  III | 8 (34.8) |
Time from surgery to lung metastasis (months) | Â |
Median (range) | 16.0 (4.0-75.0) |
Sites of lung metastasis | Â |
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) | Â |
Median (range) | 14.0 (6.0-47.0) |