title: Classifying cancer of the lip: an epidemiological perspective.
abstract: A review of papers related to oral cancer reveals some non-uniformity in the classification of cancer of the lip. This paper examines the incidence of lip cancer in England and Wales using age-standardized and age- and sex-specific rates, and relates the results to those for other sites of oral cancer. There is a falling trend in age-adjusted incidence rates for lip cancer but not for intra-oral cancers, and the age-specific incidence shows a plateau effect for lip cancer after about 75 yr of age, whereas the incidence rate continues to rise throughout life for intra-oral cancers. These differences underline the importance of classifying cancer of the lip separately from other oral cancers.
mesh_terms: D000367:Age Factors; D000368:Aged; D004739:England; D005260:Female; D006801:Humans; D008048:Lip Neoplasms / Q000453:epidemiology*; D008297:Male; D008875:Middle Aged; D009062:Mouth Neoplasms / Q000453:epidemiology; D012737:Sex Factors; D014852:Wales