four case reports of families with esophageal cancer in a high-risk region on the guangdong chaoshan coast of china.four families with a history of esophageal cancer were studied and their family trees analyzed. all the families had lived in chaoshan for about 20 generations, speak chanshan dialect, and generally have a predilection for drinking scalding gong fu tea and eating pickled chinese cabbage. the majority of the esophageal cancer patients of the first generation were diagnosed 40 or 50 years ago after presenting with the typical symptom of dysphagia, whereas patients of the second and third generatio ...200212445002
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