Abstract:
OBJECTIVES:Examine the effect of concordance between p16 overexpression and HR (high risk) HPV DNA status on overall survival in a large series of oropharyngeal squamous cell carcinoma (OPSCC) cases. MATERIALS AND METHODS:A total of 185 patients with primary OPSCC had genomic DNA tested by PCR for the HPV16 E6 and E7 oncogenes. 184 of 185 patients had p16 IHC performed. Linear array HPV genotyping was performed in all 21 HPV16/p16 discordant cases (HPV16+/p16- or HPV16-/p16+) as well as in 43 control cases. RESULTS:73 of 185 patients were positive for HR HPV (39%). Six of 73 HPV infections were due to HR HPV types other than HPV16: types 31 (1), 33 (2), 51 (1), 58 (1), and 59 (1); all 6 cases were p16 positive. p16 IHC was concordant with HR HPV testing in 169 of 184 cases (92%), and had a sensitivity and specificity of 92% and 92%. HR HPV+/p16+ and discordant HR HPV/p16 patients had significantly improved overall survival compared to HR HPV-/p16- patients. CONCLUSION:p16 IHC is a reliable surrogate marker for HR HPV testing in OPSCC. Prognostically favorable HR HPV genotypes other than HPV16 are reflected in p16 positivity.
journal_name
Oral Oncoljournal_title
Oral oncologyauthors
Liu SZ,Zandberg DP,Schumaker LM,Papadimitriou JC,Cullen KJdoi
10.1016/j.oraloncology.2015.06.014subject
Has Abstractpub_date
2015-09-01 00:00:00pages
862-9issue
9eissn
1368-8375issn
1879-0593pii
S1368-8375(15)00263-8journal_volume
51pub_type
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