“…Also, other approach is XRCC1 variant alleles that display inferior base excision repair capacities that can be related to greater risk of oral and pharyngeal cancer ( 11 ). Moreover, the interrelationship between genes which regulate cell growth such as H-ras, P53, HLA genes, immune system, cytokines, and cancer is the aim of these studies ( 12 - 14 ). However, the majority of these studies in the field of cancer problems is the surveys based on previously studied genes and new genes are not these studies subjects.…”