Utilization of the International Association for the Study of Lung Cancer and Wang's nodal map for the identification of mediastinum and hilar lymph nodes
Yang Xia1 
Yun Ma3 
Sixto Arias2 
Hans Lee2 
[1] Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang, China;Division of Pulmonary and Critical Care Medicine, Johns Hopkins University, School of Medicine, Baltimore, Maryland, USA;Department of Respiratory and Critical Care Medicine, People's Hospital, Zhengzhou University, Zhengzhou, Henan, China
Transbronchial needle aspiration (TBNA), serving as a remarkably invaluable and minimally invasive technique, has been widely used for the diagnosis and staging of mediastinal adenopathy and masses. To date, the International Association for the Study of Lung Cancer (IASLC) and Wang's nodal map are two well-documented intrathoracic lymph node guidelines for the TBNA procedure.
Method
We characterized IASLC's and Wang's map, and interpreted the correlation of the two maps station by station.
Results
The pivotal role of IASLC map is to determine N descriptor in the tumor node metastasis (TNM) staging system of lung cancer, whilst Wang's map is employed to facilitate the localization of biopsy sites for bronchoscopists during TBNA performance. Furthermore, stations 1, 3 and 5 in Wang’ map are equivalent to 4R station in IASLC’ system, while stations 4 and 6 in Wang's account for IASLC station 4L as N2 stations. In addition, Wang's stations 2, 8 and 10 are correlated with station 7 in IASLC's. Wang's stations 7 and 9 are responsible for station 11R in IASLC's map.
Conclusion
Given their unique benefits and limitations, and the practical links between the two maps, it appears reasonable to highlight the significance of their complementary utilization upon TBNA performance and lung cancer staging.
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