NFKB1 and head and neck squamous cell carcinoma: A significant signaling pathway for ESCC and HNSCC pathogenesis is controlled by the transcription factor NF-kB and was found to be regulated by miR-7, miR-9, miR-146a, and miR-34a in ESCC and by miR-125b and miR146a in HNSCC, respectively.