NFKB1 and esophageal squamous cell carcinoma: So, in the present study, we investigated the association of TNFA-308 G>A, NFKB1 -94ATTG ins/del and NFKBIA (-826 C>T and 3’UTR A>G) polymorphisms with susceptibility to esophageal squamous cell carcinoma (ESCC) or its clinical phenotypes, their interaction with environmental risk factors and their role in survival outcome of ESCC patients.