FGFR1 and metastatic malignant neoplasm in the lymph nodes: Interestingly, analysis of FGFR1–4 expression association with clinicopathological characteristics (Table 1) revealed that the FGFR4 mRNA expression was significantly higher in patients with lymph node metastasis (median: 0.02 vs. 0.01, p = 0.036; Figure 4), while FGFR1–3 expression levels were not significantly related to any of the clinicopathological features examined.