EGFR and metastatic malignant neoplasm in the lymph nodes: EGFR-AS1 was expressed higher in tumors > 4 cm than in tumors ≤ 4 cm (p < 0.001), in high-grade tumors than in low-grade tumors (p < 0.01), and in the lymph node metastasis group than in the no lymph node metastasis group (p < 0.01) (Figures 1(b)–1(e)).