The esophagus is a thin-walled hollow tube-like organ. In the esophagus, there are three areas which are the high incidence of cancer, they are located at the entrance of the esophagus, at the intersection of the esophagus and the left bronchus and at the esophageal fissure where the esophagus passes through the diaphragm, which are the narrowest areas in the esophagus. What are the early signs of esophageal cancer? If esophageal cancer can be diagnosed early, the treatment effect is not bad, but more than two-thirds of esophageal cancer patients are already in the middle or late stage when diagnosed. ”Early esophageal cancer symptoms are mostly not obvious and occur intermittently, so it is easy to be ignored. Choking on swallowing, slow and stagnant feeling of food passage, dryness of the pharynx, sternal pain or stuffy discomfort may be early symptoms of esophageal cancer, but most patients often think it is ‘heat’ or ‘pharyngitis’ and take some medicine at random. ” Dr. Zheng said that when symptoms such as obvious difficulty in swallowing and vomiting, or even wasting and anemia appear before going to the doctor, it is often already in the middle and late stages. At present, with the development of surgical techniques, medical equipment and treatment concepts, surgical efficacy has improved significantly, but there are many limitations of single surgical treatment mode for esophageal cancer, and the overall 5-year survival rate of resectable esophageal cancer still hovers at about 30%. Therefore, it is necessary to carry out early esophageal cancer screening to improve the treatment effect of esophageal cancer through early diagnosis of esophageal cancer. The occurrence of esophageal cancer is greatly related to poor dietary habits “The causes of esophageal cancer have not been fully clarified, and the pathogenesis is not particularly clear.” Dr. Zheng Song, deputy chief physician, analyzed that it may be related to water source, environment and poor dietary habits (such as addiction to pickled foods and tobacco and alcohol. Foreign studies have shown that smoking increases the likelihood of esophageal cancer by 3 to 8 times, drinking alcohol, especially strong alcohol, by 7 to 50 times, and ammonium nitrite in pickled and barbecued foods is also an extremely strong carcinogen.) Related to other factors, eating too fast, food too coarse and too hot may also cause damage to the esophageal mucosa, which in turn leads to cancer. ”In fact, esophageal cancer has obvious geographical characteristics, and the vast majority of esophageal cancers in high incidence areas may be related to arid climate and alkaline soil, high nitrite intake and lack of trace elements such as riboflavin, niacin, magnesium and zinc in the diet, spirits and tobacco can also greatly increase carcinogen sensitivity, in addition, people with a family history of esophageal cancer should also be vigilant. ” Zheng Song said. To keep away from esophageal cancer, Dr. Zheng gives several suggestions – pay attention to diversification of diet to ensure the intake of various nutrients; try not to eat hard, too hot and irritating food, and change the habit of eating too fast; people with family history of tumor and people over 40 years old should have an annual “routine + cancer prevention “physical examination”; those who have symptoms should be examined at any time to avoid missing the opportunity of early treatment.