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. 2015 Mar 2;6(2):166–171. doi: 10.1111/1759-7714.12159

Table 1.

Categorization of N2 based on the site of primary tumor and N2 zone involved

Location of primary tumor Regional N2 Non-regional N2
LUL Upper zone, AP zone Subcarinal zone, lower zone
LLL Subcarinal zone, lower zone Upper zone,AP zone
RUL Upper zone Subcarinal zone, lower zone
RML Upper zone, subcarinal zone Lower zone
RLL Subcarinal zone, lower zone Upper zone

AP, aortopulmonary; LLL, left lower lobe; LUL, left upper lobe; RLL, right lower lobe; RML, right middle lobe; RUL, right upper lobe.