Significance of p16 expression in head and neck cancer patients treated with radiotherapy and cetuximab.
Strahlenther Onkol
; 190(9): 832-8, 2014 Sep.
Article
em En
| MEDLINE
| ID: mdl-24715244
ABSTRACT
BACKGROUND:
HPV-infection, p16 positivity, and EGFR expression have been correlated with favorable responses of head and neck cancer patients treated with radiotherapy (RT) with or without chemotherapy. However, a possible correlation of HPV/p16 and EGFR status on the effect of RT in combination with cetuximab has not been sufficiently investigated. MATERIALS ANDMETHODS:
We analyzed tumor samples for p16 and EGFR expression and correlated these variables with treatment outcome. Cox-proportional-hazard regression models were applied to compare the risk of death among patients stratified according to risk factors. Survival was estimated by the Kaplan-Meier method. Results were compared with an institutional historical control group treated without cetuximab and with published data.RESULTS:
Expression of p16 was predominantly found in oropharyngeal squamous cell cancer patients (OPSCC; 36.6% positivity; 92% of all cases), while EGFR was expressed at high levels in all tumor subsites (82%). p16 expression was associated with improved overall survival in irradiated OPSCC patients (2-year overall survival of 80% in p16-positive vs. 33% overall survival in p16-negative patients). In a multivariable analysis covering all tumor sites, nodal stage (> N2a vs. ≤ N2a) and tumor site (OPSSC vs. non-OPSCC) had an impact on overall survival.CONCLUSION:
Our results show that p16 positivity is associated with a favorable outcome in OPSCC patients treated with RT and cetuximab.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Neoplasias Otorrinolaringológicas
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Carcinoma de Células Escamosas
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Anticorpos Monoclonais Humanizados
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Quimiorradioterapia
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Proteínas de Neoplasias
Tipo de estudo:
Prognostic_studies
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Risk_factors_studies
Limite:
Aged
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Ano de publicação:
2014
Tipo de documento:
Article