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Human papillomavirus and oropharyngeal squamous cell carcinoma: a New Zealand cohort study.
ANZ Journal of Surgery 2018 April
BACKGROUND: Human papillomavirus (HPV)-related oropharyngeal squamous cell carcinomas (OPSCC) are clinically, epidemiologically and prognostically distinct from other OPSCCs. The incidence of HPV-related OPSCCs has increased significantly worldwide over the past few decades. However, no studies of OPSCC with direct molecular HPV testing has been conducted in New Zealand.
AIMS: To estimate the proportion of OPSCCs attributable to HPV infections in a New Zealand population with a validated HPV testing algorithm.
METHODS: HPV-status was determined by p16 immunohistochemistry and polymerase chain reaction (PCR) of both L1 and E6/7 genes on 55 OPSCCs diagnosed in 2010 and 2011 in Central and South Auckland. Baseline and survival analyses were performed according to HPV status.
RESULTS: Forty-one (75%) of OPSCC tumours had HPV infections. There was 98% concordance between p16 immunohistochemistry and real-time E6/E7 PCR. After a median follow-up period of 2.6 years, patients with OPSCC of HPV aetiology had more favourable outcomes compared to patients with HPV-negative OPSCC (hazard ratio 0.14, P = 0.02) after adjustment for other variables.
CONCLUSION: This study highlights the significant role that HPV plays in the aetiology of OPSCC in New Zealand, and confirms the high rate of accuracy of p16 immunostaining.
AIMS: To estimate the proportion of OPSCCs attributable to HPV infections in a New Zealand population with a validated HPV testing algorithm.
METHODS: HPV-status was determined by p16 immunohistochemistry and polymerase chain reaction (PCR) of both L1 and E6/7 genes on 55 OPSCCs diagnosed in 2010 and 2011 in Central and South Auckland. Baseline and survival analyses were performed according to HPV status.
RESULTS: Forty-one (75%) of OPSCC tumours had HPV infections. There was 98% concordance between p16 immunohistochemistry and real-time E6/E7 PCR. After a median follow-up period of 2.6 years, patients with OPSCC of HPV aetiology had more favourable outcomes compared to patients with HPV-negative OPSCC (hazard ratio 0.14, P = 0.02) after adjustment for other variables.
CONCLUSION: This study highlights the significant role that HPV plays in the aetiology of OPSCC in New Zealand, and confirms the high rate of accuracy of p16 immunostaining.
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