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Original Article
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Volume 344:1125-1131 April 12, 2001 Number 15
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Human Papillomavirus Infection as a Risk Factor for Squamous-Cell Carcinoma of the Head and Neck
Jon Mork, M.D., A. Kathrine Lie, M.D., Eystein Glattre, M.D., Sarah Clark, D.Phil., Goran Hallmans, M.D., Egil Jellum, Ph.D., Pentti Koskela, Ph.D., Bjorn Moller, M.Sc., Eero Pukkala, Ph.D., John T. Schiller, Ph.D., Zhaohui Wang, M.D., Linda Youngman, Ph.D., Matti Lehtinen, M.D., and Joakim Dillner, M.D.

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ABSTRACT

Background Oncogenic human papillomaviruses (HPVs), especially HPV type 16 (HPV-16), cause anogenital epithelial cancers and are suspected of causing epithelial cancers of the head and neck.

Methods To examine the relation between head and neck cancers and HPVs, we performed a nested case–control study within a joint Nordic cohort in which serum samples were collected from almost 900,000 subjects. Samples collected at enrollment from 292 persons in whom squamous-cell carcinoma of the head and neck developed, on average, 9.4 years after enrollment and from 1568 matched controls were analyzed for antibodies against HPV-16, HPV-18, HPV-33, and HPV-73 and for cotinine levels as a marker of smoking habits. Polymerase-chain-reaction (PCR) analyses for HPV DNA were performed in tumor tissue from 160 of the study patients with cancer.

Results After adjustment for cotinine levels, the odds ratio for squamous-cell carcinoma of the head and neck in subjects who were seropositive for HPV-16 was 2.2 (95 percent confidence interval, 1.4 to 3.4). No increased risk was observed for other HPV types. Fifty percent of oropharyngeal and 14 percent of tongue cancers contained HPV-16 DNA, according to PCR analysis.

Conclusions HPV-16 infection may be a risk factor for squamous-cell carcinoma of the head and neck.


Source Information

From the Cancer Registry of Norway, Oslo (J.M., E.G., B.M.); the Department of Otolaryngology, National Hospital, Oslo, Norway (J.M.); the Department of Pathology, Norwegian Radium Hospital, Oslo (A.K.L.); the Northern Sweden Health and Disease Study, Umeå, Sweden (G.H.); the Janus Committee, Norwegian Cancer Society, Oslo, Norway (E.J.); the National Public Health Institute, Oulu, Finland (P.K.); the Finnish Cancer Registry, Helsinki, Finland (E.P.); the Laboratory of Cellular Oncology, National Cancer Institute, Bethesda, Md. (J.T.S.); the Clinical Trial Service Unit and Epidemiological Studies Unit, University of Oxford, Oxford, United Kingdom (L.Y.); the National Public Health Institute, Helsinki, Finland (M.L., J.D.); and the Microbiology and Tumor Biology Center, Karolinska Institute, Stockholm, Sweden (J.D.).

Address reprint requests to Dr. Mork at the Department of Otolaryngology, National Hospital, N-0027 Oslo, Norway, or at jon.mork{at}ioks.uio.no.

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