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Abstract
To assess whether poorly differentiated tumors and non-keratinizing tumors have similar demographic and clinical characteristics as human papilloma virus (HPV)-positive tumors in patients with oropharyngeal cancer.The study cohort included patients diagnosed with oropharyngeal squamous cell carcinoma between 2004 and 2012 identified in the Surveillance, Epidemiology, and End Results 18 Database.Poorly differentiated tumors were associated with early T stage (odds ratio (OR)=1.23), nodal metastasis (OR=1.66) and tonsil fossa origin (OR=1.22). Non-keratinizing tumors were associated with early T stage (OR=1.23), nodal metastasis (OR=1.66) and tonsil fossa origin (OR=1.22). Poorly differentiated tumors were associated with improved overall survival (OS) (hazard ratio (HR)=0.78, p<0.001). Non-keratinizing tumors were associated with improved OS (HR=0.71, p<0.001).Histological grade and keratinization may be useful surrogates to adjust for the effects of HPV status in oropharyngeal cancer studies utilizing population-based cancer databases.
View details for PubMedID 27798923