4R - Right lower paratracheal nodes
4R - Nodi mediastinales inferiores dextri
Definition
Station 4R: Right Lower Paratracheal Lymph nodes
Boundaries:
The upper border of station 4R is the intersection of the caudal margin of the innominate vein with the trachea.
The lower border of station 4R is the lower border of the azygos vein (Note: on CT, in daily practice, the lower border of station 4R may be considered as the right tracheobronchial angle).
The left lateral wall of the trachea (not the midline) serves as the boundary between stations 4R and 4L.
References
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. ElSherief, Charles T. Lau, Carol C. Wu, Richard L. Drake, Gerald F. Abbott, and Thomas W. Rice RadioGraphics 2014 34:6, 16801691
