Prognostic Implications of Selective Dissection of Left Lower Paratracheal Lymph Nodes in Patients with Left-Sided Non-Small Cell Lung Cancer.

OS and RFS did not differ significantly between matched patients with and without S4L-LND. Among participants with S4L-LN involvement, metastases occurred more frequently in the LUL than the LLL, and their incidence increased significantly with more advanced cN stage. Thus, patients with LUL or advanced cN lung cancers may benefit from S4L-LND.