Human Papillomaviruses in Head and Neck Carcinomas
5/9/2007 web-based article Stina Syrjänen, D.D.S., Ph.D. New England Journal of Medicine Volume 356:1993-1995 Each year, almost 650,000 patients worldwide receive the diagnosis of head and neck cancer and some 350,000 die from this disease.1 Nearly 90% of these cancers are squamous-cell carcinomas. The two main causative factors in approximately 80% of oral, oropharyngeal, and laryngeal carcinomas are smoking and alcohol use. Consumption of vegetables and fruit may modulate the carcinogenic effects of tobacco and alcohol, whereas low body-mass index increases the risk of oral cancer.2 The idea that human papillomavirus (HPV) plays a role in these cancers has been under investigation for at least 20 years. It is widely accepted that HPV causes cervical cancer.3 HPV has also been associated with several other types of squamous-cell carcinoma and their precursors at different sites — skin, vulva, vagina, penis, esophagus, conjunctiva, paranasal sinuses, and bronchus — but the role of HPV in the pathogenesis of the lesions is less clear than it is in cervical cancer.4 The similarity of the morphologic features of genital and oral HPV-associated lesions was one of the early findings that raised the possibility that HPV might be involved in oral and laryngeal squamous-cell carcinomas.5,6 Until recently, however, the role of HPV in the pathogenesis of head and neck squamous-cell carcinoma has been uncertain, mainly because detection of HPV DNA has been highly variable, with rates ranging from 0 to 100%.4 New data from case–control studies suggest that HPV is an independent risk factor for oral [...]