However, no significant association was observed between FGFR1 protein expression and clinical characteristics (age, gender, smoking status, lymph node metastasis, tumor stage, or brain metastasis) (Table 2) or relapse-free survival (RFS) and overall survival (OS) (all log-rank p-values >0.05) (Figure 2). Here, FGFR1 is linked to metastatic malignant neoplasm in the lymph nodes.