Statistically speaking, head and neck cancer per se (excluding melano ma and basal cell carcinoma) does not outwardly seem to pose a serious threat - 27,500/870,000 total cancer cases estimated for 1984 (or 3.2% of all cancers) and 9,350/450,000 total cancer deaths in 1984 (or 2.1 %) for the United States. Yet in clinical practice, by the time that diagnosis is made, more than 60% of oral cancers have already spread to the nearby lymph node system. And while the overall five-year survival rate for localized oral cancer is 67%, this rate decreases drastically to only 25% when the original...