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Fig. 1B —Regional nodal stations for lung cancer staging. (Modified and reprinted with permission from [1]). Drawings show revised nodal staging system. Mediastinum is viewed from frontal (A) and left anterior oblique (B) projections. Heart and proximal great vessels have been cut away in both drawings. Trachea and bronchi, aortic arch (Ao), and main pulmonary artery (PA) are anatomic landmarks used to define various nodal stations. In these diagrams, nodes occupying nodal stations are assigned colors, and nodes on CT scans have been colored to correspond to assigned colors. Some colors have been changed from original drawing [1] for greater contrast on CT scans.

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