Promoter region mutations of the telomerase reverse transcriptase (TERT) gene in head and neck squamous cell carcinoma

Objective. The aim of the present study was to assess the prevalence of TERT promoter region mutations in tumor samples of patients with squamous cell carcinoma at different sites of the head and neck region and correlate it with patients' clinicopathologic data. Study Design. Mutations in promoter region of the TERT gene were analyzed with polymerase chain reaction-based direct sequencing method using formalin-fixed, paraffin-embedded tumor samples of 189 HNSCCs. TERT promoter region mutations were assessed in terms of age, gender, location, smoking, alcohol consumption, and overall survival. Results. TERT promoter region mutations were detected in the oral cavity (75%); larynx (8.4%), hypopharynx (16.6%), and oropharynx (0%). TERT promoter region mutations are associated with younger age and female gender and have a reverse relationship with smoking and alcohol consumption. Conclusions. We found statistically significant higher rates of TERT promoter region mutations in tumor samples of patients with squamous cell carcinoma in the oral cavity compared with other locations in the head and neck region.