4L - Left lower paratracheal nodes
4L - Nodi mediastinales inferiores sinistri
Definition
Station 4L (Left Lower Paratracheal Lymph nodes) are nodes lateral to the left border of the trachea and medial to the ligamentum arteriosum.
Boundaries:
- The upper border of station 4L is the upper margin of the aortic arch.
- The lower border of station 4L is the upper rim of the left main pulmonary artery (Note: on CT, in daily practice, the lower border of station 4L may be considered as the left tracheobronchial angle).
- The left lateral wall of the trachea (not the midline) serves as the boundary between stations 4R and 4L.
Sources :
- IASLC lymph node map - https://www.iaslc.
- International Association for the Study of Lung Cancer (IASLC) Lymph Node Map: Radiologic Review with CT Illustration Ahmed H. El-Sherief, Charles T. Lau, Carol C. Wu, Richard L. Drake, Gerald F. Abbott, and Thomas W. Rice RadioGraphics 2014 34:6, 1680-1691
References
