AHRR and metastatic malignant neoplasm in the lymph nodes: Based on the categories defined with the aforementioned methods, the decreased expression of AHRR was significantly correlated with tumor size (P<0.001), depth of tumor infiltration (T stage, P<0.001), distant metastases (M) (P = 0.004) and TNM stage (P<0.001), but not with age, gender or local lymph node metastasis (N stage).