6 nodes: 3 N1 + 3 N2
N1:
Intrapulmonary, lobar, hilar
N2:: 3 stations (lobe-dependent)
RUL and ML 7 + 2 among 2,3,4
RLL
7+4 + (8 o 9)
LUL
7 + 5 + 6
LLL
7 + 8 + 9
Lymphadenectomy
ESTS/IASLC guidelines, 2006