Oropharyngeal cancer epidemic and human papillomavirus

Source: Foodconsumer Author: Torbjörn Ramqvist and Tina Dalianis Abstract A growing body of research shows that human papillomavirus (HPV) is a common and increasing cause of oropharyngeal squamous cell carcinoma (OSCC). Thus, the International Agency for Research against Cancer has acknowledged HPV as a risk factor for OSCC, in addition to smoking and alcohol consumption. Recently, in Finland, the United Kingdom, the Netherlands, the United States, and Sweden, incidence of OSCC has increased, and an increase in the proportion of HPV-positive tumors was noted. On the basis of these data and reports indicating that patients with HPV-positive cancer have their first sexual experience at a young age and have multiple partners, we postulate that increased incidence of OSCC in the United States and some countries in northern Europe is because of a new, primarily sexually transmitted HPV epidemic. We also suggest that individualized treatment modalities and preventive vaccination should be further explored. In many countries, vaccines against some human papillomavirus (HPV) types are now administered to girls and young women with the goal of protecting them against HPV-induced cervical cancer (1,2). The introduction of HPV vaccines has also drawn more attention to the fact that HPV is associated not only with cervical cancer and genital warts but also with other tumors, such as head neck and anogenital cancers (3). We focus on the role of HPV in the increased incidence of oropharyngeal squamous cell carcinoma (OSCC), the head and neck cancer in which HPV is most commonly found (4). Head and neck cancer [...]

2010-11-09T20:51:27-07:00November, 2010|Oral Cancer News|

HPV causing “slow epidemic” of oral cancers

Source: www.medscape.com Author: Janis C. Kelly Human papillomavirus (HPV) is a risk factor for oropharyngeal squamous cell carcinoma (OSCC), and might account for the steady increase in OSCC incidence, even in subjects who do not smoke or consume alcohol, according to Swedish researchers. A review of recent studies, conducted by Trobjorn Ramqvist, MD, and Tina Dalianis, MD, PhD, and published online October 13 in Emerging Infectious Diseases, suggests that changes in sexual practices are behind the surge in OSCC cases linked to sexually transmitted HPV. The key factors appear to be multiple sex partners, starting sexual activity at a younger age, and increased oral sex. The data are startling. For example, from 1970 to 2002, tonsillar cancer (which is the most common OSCC) increased in Stockholm, Sweden, by 2.8-fold, and by 2006/07, 93% of all tonsillar cancers in that city were HPV-positive. Dr. Dalianis, who is professor of tumor virology and the head of the Department of Oncology–Pathology at Karolinska Institutet in Stockholm, told Medscape Medical News that "we realized that there was an increase in HPV-induced tonsillar cancer, but we did not realize it was so eminent until we separated the 2 groups (HPV-negative and -positive tonsillar cancer cases) the way we did." The most common OSCC is tonsillar cancer, followed by base of tongue cancer. Overall 5-year survival for OSCC is about 25%, and HPV-positive OSCC generally has better clinical outcomes than HPV-negative disease. Dr. Dalianis said that HPV (most commonly type 16) was found in 45% to [...]

HPV ‘Epidemic’ Behind Increases in Oral Cancer

Source: MedPage Today Author: Crystal Phend Rising rates of oropharyngeal squamous cell carcinoma may stem from a new epidemic of sexually-transmitted human papillomavirus (HPV), according to a review. The incidence of oral cancer has been on the rise over recent decades in the U.S. and some northern European countries, noted Torbjörn Ramqvist, of the Karolinska Institute in Stockholm, and Tina Dalianis, of the Swedish Institute for Infectious Disease Control in Solna, Sweden. The corresponding increase in the percentage of those tumors positive for HPV over the past 10 years isn't simply because of more sensitive testing, they wrote in the November issue of Emerging Infectious Diseases. For example, the Swedish Cancer Registry documented a 2.8-fold increase in tonsillar cancer around Stockholm from 1970 to 2002. Examination of all available tonsillar cancer samples indicated a rise in HPV-positive tumors over this period from 23% to 68%, with a further jump to 93% by 2007. Similar patterns were seen for tumors at the base of the tongue, the second most common type of oropharyngeal squamous cell carcinoma. "We suggest that this increase is caused by a slow epidemic of HPV infection–induced oropharyngeal squamous cell carcinoma," Ramqvist and Dalianis wrote in the paper. Changes in sexual patterns are likely to blame, "such as increased oral sex or increasing numbers of sex partners," they added. The HPV-positive rate is much higher -- at 45% to 100% -- in oropharyngeal squamous cell carcinomas than for other types of head and neck squamous cell carcinomas, in which [...]

2010-10-13T16:37:25-07:00October, 2010|Oral Cancer News|
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