4.6 Article

Rising Trend in the Prevalence of HPV-Driven Oropharyngeal Squamous Cell Carcinoma during 2000-2022 in Northeastern Italy: Implication for Using p16INK4a as a Surrogate Marker for HPV-Driven Carcinogenesis

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CANCERS
卷 15, 期 9, 页码 -

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MDPI
DOI: 10.3390/cancers15092643

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biomarker; epidemiology; head and neck cancer; human papillomavirus; oropharyngeal cancer; p16(INK4a); prevalence; squamous cell carcinoma

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This study found that the prevalence of oropharyngeal squamous cell carcinomas (OPSCCs) driven by HPV infection is increasing in Northeastern Italy. The study also suggests that the prevalence of HPV infection impacts the positive predictive value of p16(INK4a) overexpression. Therefore, each institution should consider the subsite-specific prevalence rates of HPV-driven OPSCC when using p16(INK4a) overexpression as a surrogate marker for transforming HPV infection.
Background: The prevalence and incidence of oropharyngeal squamous cell carcinomas (OPSCCs) driven by human papillomavirus (HPV) infection are increasing worldwide, being higher in high-income countries. However, data from Italy are scanty. p16(INK4a) overexpression is the standard in determining HPV-driven carcinogenesis, but disease prevalence impacts on its positive predictive value. Methods: This is a multicenter retrospective study enrolling 390 consecutive patients aged =18 years, diagnosed with pathologically confirmed OPSCC in Northeastern Italy between 2000 and 2022. High-risk HPV-DNA and p16(INK4a) status were retrieved from medical records or evaluated in formalin-fixed paraffin-embedded specimens. A tumor was defined as HPV-driven when double positive for high-risk HPV-DNA and p16(INK4a) overexpression. Results: Overall, 125 cases (32%) were HPV-driven, with a significant upward temporal trend from 12% in 2000-2006 to 50% in 2019-2022. The prevalence of HPV-driven cancer of the tonsil and base of the tongue increased up to 59%, whereas it remained below 10% in other subsites. Consequently, the p16(INK4a) positive predictive value was 89% for the former and 29% for the latter. Conclusions: The prevalence of HPV-driven OPSCC continued to increase, even in the most recent period. When using p16(INK4a) overexpression as a surrogate marker of transforming HPV infection, each institution should consider the subsite-specific prevalence rates of HPV-driven OPSCC as these significantly impact on its positive predictive value.

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