Esophageal cancer refers to the tumor that occurs in the epithelial tissue of esophagus, and the incidence of esophageal cancer in China is the sixth in the mortality rate of malignant tumors, and the age of the patients is more than forty, and the prevalence rate of men is higher than that of women. If gastroscopy is normal, the probability of getting esophageal cancer after one year should not be big. Although the probability is very low, it is not ruled out because the growth location of esophageal cancer is different, some are more obvious, some are not. If it starts to grow in the middle layer of the esophagus and does not form an obvious mass before, it is difficult to find it even with gastroscopy and it is difficult to make a clear diagnosis. Early stage of esophageal cancer generally tends to grow flatly, i.e., it does not form obvious lumps, and it is also easier to miss the diagnosis. However, at present, the clarity of gastroscopy has been greatly improved than before, and some new electronic staining techniques can distinguish the color of esophageal cancer site and its surrounding, which is helpful for the doctors to observe which part of the shoe is esophageal cancer and which is relatively normal mucosa. The rate of early esophageal cancer detection is significantly higher than before. In addition, normal gastroscopy one year ago does not mean that esophageal cancer will not grow after one year, although this rate will be very low, but it does not exclude this possibility, the malignant degree of esophageal cancer is also different, some of them grow very big in one year, and some of them do not grow for several years, and there are also differences in the physical condition and dietary habits of each individual, and the condition is also different. Dietary habits like eating too hot or drinking hot tea, smoking, drinking alcohol, long-term eating pickled food then the greater the probability of getting esophageal rate, of course, also varies from person to person, there is a genetic predisposition to people, the relative incidence of higher chances. If you feel obvious esophagus-related discomfort, even if you have had a gastroscopy within 1 year, you need to go to a regular medical institution in time, repeat the gastroscopy or further examination if necessary.