Global Trends in Oral and Pharyngeal Cancer Incidence and Mortality

To provide an up-to-date overview of recent trends in mortality from oral and pharyngeal cancer, we analysed death certification data for 61 countries worldwide provided by the World Health Organization in 2010-2015, and, for selected most populous countries, over the period 1970-2016. For 12 largest countries, we analysed incidence derived from Cancer Incidence in Five Continents in 1960-2012 for all oral and pharyngeal cancers and by subsites. In 2015, male age-standardized (world population) death rates per 100,000 were 5.03 in the European Union (EU), 8.33 in the Russian Federation, 2.53 in the USA, and 3.04 in Japan; corresponding rates in women were 1.23, 1.23, 0.82, and 0.76. Male mortality decreased over the last decades in several European countries, with earlier and sharper declines in southern Europe; conversely, mortality was still increasing in a few eastern European countries and the UK. Mortality in men also decreased in Argentina, Australia, and Hong Kong, while it levelled off over more recent calendar years in Brazil, Japan, Mexico, the Republic of Korea, as well as in Australia and the USA. Female mortality slightly rose in various European countries. Incidence trends in the largest countries were broadly consistent with mortality ones, but oropharyngeal cancer incidence rose in many countries. Changes in tobacco and alcohol exposure in men over the last decades likely explain the favourable trends in oral and pharyngeal cancer mortality and incidence observed in selected countries worldwide, while increased human papilloma virus infection is likely responsible for the rise in oropharyngeal cancer incidence.