| the relative frequency of the helicobacter pylori infection in proximal gastric cancers. | gastric cancer with the annual mortality of 700 000 is the second cause of death in the world. iran with the annual incidence of 37 in 100 000 is among areas with high risk of gastric cancer. in iran, khuzestan province with the annual incidence of 10 -15 in 100 000 is among areas with moderate risk. the role of helicobacter pylori infection in distal gastric cancer as one of the most important risk factors of gastric ulcer has been proved but its role in proximal gastric cancer is controversial ... | 2013 | 24413205 |