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Cancers originating in the esophagus, gastroesophageal junctions, and stomach constitute a major health problem worldwide. In the United States, 37,600 new diagnoses of and 25,150 deaths from upper gastrointestinal cancers were estimated in 2009. 1 A dramatic shift in the location of upper gastrointestinal tumors has occurred in the United States, 2 and changes in histology and location of them were observed in some parts of Europe. 3, 4 In countries in the Western Hemisphere, the most common sites of gastric cancer are the proximal lesser curvature, cardia, and gastroesophageal junction. 2 These changing trends may also begin to occur in South America and Asia.