Abstract
Laryngeal squamous cell cancer (LSCC) is one of the most common head and neck cancers in which genetic factors play an important role in its occurrence. This study investigated the association of KRAS and NRAS gene polymorphisms with the risk of LSCC. KRAS polymorphisms including rs712, rs61764370, rs8720, and rs9266, as well as NRAS rs14804, were compared in the patient group (n=120) and the control group (n=100). The Sanger sequencing method was used to identify these polymorphisms. The results showed that KRAS rs8720 is associated with an increased risk of LSCC; consequently, those with the CT genotype were at a higher risk than those with the CC genotype. Also, the CC genotype had a protective effect on rs14804 polymorphism of the NRAS gene. These findings show that some KRAS and NRAS polymorphisms can be used as diagnostic and prognostic biomarkers in LSCC, and their accurate identification by Sanger sequencing is of great importance in research related to cancer genetics.