Table 1. Clinicopathological characteristics of the patients.

No. of patients (%)
Patients with paired primary and nodal metastatic lesions (n=26)
Age	mean	66 years-old
Gender	male / female	18 (69%) / 8 (31%)
p-stage (23)	IIB / IIIA /IIIB / IV	2 (8%) / 18 (69%) / 5(19%) / 1(4%)
Histology (23)	squamous / adeno / large / adenosquamous *	8 (31%) /14 (54%) /3 (12%) /1 (4%)
Patients with paired primary and distant metastatic lesions (n=6)
Age	mean	62 years-old
Gender	male / female	5 (83%) / 1 (17%)
Distant site	lung / adrenal gland	3 (50%) / 3 (50%)
Histology*	squamous / adeno / large	1 (17%) / 4 (67%) / 1 (17%)

* adeno: adenocarcinoma; squamous: squamous cell carcinoma; large: large cell carcinoma; adenosquamous: adenosquamous cell carcinoma