RELA and neoplasm: When we compared staining intensity of phospho-Ser536-p65 expression in the cytoplasm of normal mucosa, primary tumour and metastasis in the lymph node we found significantly more samples with the strong staining of phospho-Ser536-p65 expression in primary tumour than in normal mucosa in the both non-RT and RT groups (p<0.0001 for both Chi-square and McNemar tests for both non-RT and RT groups, Figure 1).