Tobacco and alcohol have long been the main causes of these tumors, which occur in the tonsils, base of the tongue and upper throat. But over the past few years, studies have shown HPV is playing a role in that rise, probably due to an increase in oral sex even as tobacco use was dropping.The new study took a closer look, tracking HPV over time by directly testing tumor tissue from 271 patients that had been stored in cancer registries in Hawaii, Iowa and Los Angeles. The proportion that were HPV-positive rose from just 16 percent in the late 1980s to nearly 73 percent by the early 2000s.Oral cancer has always been a bigger threat to men than women. Gillison says women account for only about 1 in 4 cases, and their incidence is holding steady while men’s is rising. That raises questions about gender differences in sexual behavior or whether oral HPV infection is likely to linger longer in men.
via Cervical cancer virus fuels oral cancer type, too – Yahoo! News.