Oral cavity tumors in younger patients show a poor prognosis and do not contain viral RNA.

Brägelmann J, Dagogo-Jack I, El Dinali M, Stricker T, Brown CD, Zuo Z, Khattri A, Keck M, McNerney ME, Longnecker R, Bieging K, Kocherginsky M, Alexander K, Salgia R, Lingen MW, Vokes EE, White KP, Cohen EE, Seiwert TY
Oral Oncol. 2013 49 (6): 525-33

PMID: 23490885 · DOI:10.1016/j.oraloncology.2013.02.003

BACKGROUND - Oral cavity and in particular oral tongue cancers occur with a rising incidence in younger patients often lacking the typical risk factors of tobacco use, alcohol use, and human papilloma virus (HPV) infection. Their prognosis when treated with chemoradiation has not been well studied and responsible risk factors remain elusive. A viral etiology (other than HPV) has been hypothesized.

METHODS - First we analyzed outcomes from 748 head and neck cancer patients with locoregionally advanced stage tumors treated with curative-intent chemoradiation by anatomic site. Second, we analyzed seven oral tongue (OT) tumors from young, non-smokers/non-drinkers for the presence of viral mRNA using short-read massively-parallel sequencing (RNA-Seq) in combination with a newly-developed digital subtraction method followed by viral screening and discovery algorithms. For positive controls we used an HPV16-positive HNC cell line, a cervical cancer, and an EBV-LMP2A transgene lymphoma.

RESULTS - Younger patients with oral cavity tumors had worse outcomes compared to non-oral cavity patients. Surprisingly none of the seven oral tongue cancers showed significant presence of viral transcripts. In positive controls the expected viral material was identified.

CONCLUSION - Oral cavity tumors in younger patients have a poor prognosis and do not appear to be caused by a transcriptionally active oncovirus.

Copyright © 2013 Elsevier Ltd. All rights reserved.

MeSH Terms (11)

Adult Algorithms Female Herpesvirus 4, Human Humans Male Mouth Neoplasms Papillomaviridae Prognosis RNA, Viral Survival Analysis

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