EGFR and metastatic malignant neoplasm in the lymph nodes: The pooled data showed that patients with lymph node metastasis exhibited significantly higher levels of EGFR expression than were observed in patients without metastasis, with a combined OR of 1.72 (95% CI: 1.23–2.40) and without heterogeneity (I2 = 0.00%, Ph = 0.862).