Gastric cancer represents a challenging health problem around the world. It is the fourth most common cancer behind lung, breast, and colon and rectum cancers. An analysis of the worldwide incidence and mortality from gastric cancer had estimated that 691,432 new cases among men and 375,111 cases among women would occur in 2007 (Garcia et al. 2007). It was also estimated that approximately 800,000 patients would die of this disease annually (Garcia et al. 2007). In the United States, it was estimated that 21,000 new cases of gastric cancer would occur in 2010, with 10,570 deaths expected (Jemal et al. 2010).
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