Table 1. Molecular markers associated with synchronous lymph node metastasis of NSCLC. DFS, disease-free survival; LncRNAs, long non-coding RNAs; LUAD, adenocarcinoma; LUSC, lung squamous cell carcinoma; NSCLC, non-small cell lung cancer; PFS, progression-free survival; OS, overall survival; RFS, recurrence/relapse-free survival; "-", not available. The numbers in brackets indicate the size of validation cohorts