Esophageal cancer is a malignant tumor that occurs in the mucosal epithelium of esophagus. Patients with early stage esophageal cancer may have no obvious symptoms, some of them may be post-sternal discomfort, foreign body sensation or stagnation in swallowing food, etc., and the symptoms will become obvious with the development of the disease, and there are more clinical manifestations of middle and late stage esophageal cancer, such as progressive dysphagia, pain, bleeding, hoarseness, etc. 1. Progressive dysphagia: Progressive dysphagia is a typical symptom, and the tolerable food gradually changes from solid to liquid, and even Swallowing liquids are difficult, there is a clear choking sensation, because saliva and esophageal secretions can not be swallowed or discharged into the stomach, can only be spit out through the mouth; 2, pain: early discomfort or mild pain behind the sternum, the duration is short, with the development of the disease can gradually aggravate, the lesion can lead to esophageal motor dysfunction, spasmodic contraction of the cardia, there is a persistent hidden pain or burning-like pain behind the sternum or scapular area of the back The tumor invasion of esophagus may cause bleeding, the bleeding may not be obvious when the amount of bleeding is small, but the larger amount of bleeding may show as vomiting blood, black stool, etc. In advanced stage, the tumor invasion to the thoracic aorta may even cause fatal hemorrhage; 4. 5.Other: As the disease progresses, the above symptoms will be aggravated, and the proliferation of cancer cells will consume the body’s nutrition, resulting in cachexia, and the patient will gradually lose weight, often accompanied by weakness and mental incompetence, etc. The advanced esophageal cancer may involve surrounding tissues or metastasize to other organs, which may cause corresponding symptoms, such as compression of cervical sympathetic ganglion, which may cause eye invagination, pupil narrowing, and drooping Horner’s eyelid. For example, compression of cervical sympathetic ganglion may cause Horner syndrome, invasion of trachea may cause choking and cough, metastasis to liver may cause ascites, etc.