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Background Esophageal cancer is the seventh most common malignancy worldwide and the fifth in the developing countries. Its incidence is rising more rapidly than any other cancer. The risk of developing esophageal cancer between countries may be influenced by diversity of cultures and customs. One of the unique customs in Yemen is chewing khat, therefore the aim of this study was to determine the risk factors associated with esophageal cancer in Yemen, including chewing khat.

Case control study on risk factors associated with esophageal cancer in Yemen