Cancer is the second leading cause of death among individuals in the United States of America (Ries et al., 2000). Gastro-intestinal (GI) cancers account for approximately 253,500 new cases each year in both men and women. Most of the patients with GI cancer have a poor outcome (American Cancer Society., 2005; Ilson, 2001), accounting for approximately 16% of cancer related death in women and 25% of cancer related death in men (American Cancer Society, 2005). Of all cancers, lung cancer is the leading cause for death among men and women (American Cancer Society., 2005).