In the United States in 1993 the American Cancer Society estimated that there were about 1,300,000 new cases of invasive cancer diagnosed. At the time of presentation about 70% of those patients represented limited local regional disease without evidences of distant dissemination. About 30% of the patients had demonstrated metastatic disease at the time of initial diagnosis or about 390,000 patients. Of those patients with local regional disease about 56% would be cured by the best treatme...