Figure 4. Boundary distinction among stations 1, 2 and 3. (A) Station 1 supaclavicular lymph node. (B) Inferior to the lung apex, the yellow line running horizontally from anterior margin of both lung pleura interface separates station 1 from station 3p. (C) At the suprasternal notch, the yellow line running horizontally from anterior margin of both lung pleura interface separates station 1 from station 2. The red line running along posterior wall of trachea separates station 2 from 3p. (D) Station 3a and 3p at the level of tracheal bifurcation (dashed red arrow).
