HIF1A and metastatic malignant neoplasm in the lymph nodes: The expression of HIF-1α in III‒IV stage or lymph node metastasis was significantly higher than that in I‒II stage or that without lymph node metastasis, respectively (OR=2.66, 95% (CI): 1.87,3.79, p<0.00001; OR= 3.98, 95% (CI): 2.10,12.89, p<0.0001).