The quality of internet sites providing information relating to oral cancer.

To determine the quality of the information available on the internet in relation to oral cancer. Sites were identified using two search engines (Google and Yahoo), and the search term "oral cancer". The first 100 consecutive sites in each search were visited and classified. The websites were evaluated for quality of content by using the validated DISCERN rating instrument and the JAMA benchmarks; the existence of the Health on the Net (HON) seal was also registered. The Google search yielded 25,70,000 sites for oral cancer, while Yahoo yielded 6,99,00,000. We reviewed 29 Google websites and 22 Yahoo websites. Based on the JAMA benchmarks, only two sites (6.9%) met the four criteria in the Google search, versus a single site (4.5%) in the Yahoo search. As regards the DISCERN instrument, no site obtained the maximum score. Moreover, in the Google search, 72.5% of the sites had serious deficiencies, versus 68.2% of the Yahoo sites. Lastly, eight of the Google sites (27.6%) and four of the Yahoo sites (18.2%) presented the HON seal. The quality of the healthcare information related to oral cancer on the internet is poor. There is a need to be vigilant about the quality of information found on the internet.