| http://www.w3.org/ns/prov#value | - by the 1992 edition of the AJCC staging manual more accurately reflects a lower proportion of cases arising in the oral cavity.19 Analysis of the NCDB data using this AJCC classification identifies that laryngeal cancer is the most common head and neck malignancy in the United States and outnumbers cancers of the oral cavity (including cancers of the lip) at a ratio of 1.2:1.
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