In the present study, we found 35 (18.8%) tumours with co‐expression of p65 and p‐p105, 26 (14.0%) with p65‐positive expression alone, 55 (29.6%) with p‐p105‐positive expression alone and 70 (37.6%) that were both p65 negative and p‐p105 negative in this population. This evidence concerns the gene NFKB1 and neoplasm.