Prevalence of human papillomavirus in head and neck cancers at tertiary care centers in the United States over time

BACKGROUND Human papillomavirus (HPV) is responsible for a growing proportion of oropharyngeal squamous cell carcinomas (OPSCCs) among men and White individuals. Whether similar trends apply to women, non‐Whites, and non‐oropharyngeal squamous cell carcinomas (non‐OPSCCs) is unknown. METHODS This is a cross‐sectional analysis combining 2 multi‐institutional case series of incident head and neck squamous cell carcinoma (HNSCC) cases. Incident HNSCCs from 1995 to 2012 were enrolled retrospectively using banked tumor samples and medical record ion. Incident HNSCCs from 2013 to 2019 were enrolled prospectively. The prevalence of tumor HPV biomarkers was tested over 3 time periods (1995‐2003, 2004‐2012, and 2013‐2019). Centralized testing was done for p16 immunohistochemistry (p16) and oncogenic HPV in situ hybridization (ISH). RESULTS A total of 1209 incident cases of HNSCC were included. Prevalence of p16‐ and ISH‐positive tumors increased significantly for oropharynx cancers over time. The majority were positive after 2013 for White patients (p16, 92%; P