Symptoms of mid-stage esophageal cancer include dysphagia, chest and back pain, vomiting and so on. 1. Dysphagia: it is a typical symptom of intermediate stage of esophageal cancer, which is mainly manifested as progressive dysphagia, which is not easy to swallow solid food at first, and with further development of the disease, the patient will have difficulty in swallowing semi-liquid food, which will be aggravated gradually. Some patients may also have symptoms such as weakness, dehydration and weight loss. 2. Chest and back pain: the pain is often persistent, mostly in the back of the sternum or scapular region, and some patients may be accompanied by fever. 3. Vomiting: this symptom sometimes occurs together with dysphagia, which usually manifests as vomiting a large amount of mucus, and if it accidentally overflows into the respiratory tract, it will cause coughing. 4. Bleeding and choking on drinking water: corresponding symptoms may appear when the tumor invades adjacent organs, such as tracheo-esophageal fistula when it invades the trachea, which manifests as choking on drinking water, fever, etc.; invasion of peripheral blood vessels may lead to hemorrhage and so on. The prognosis of esophageal cancer is related to the stage of the disease, so patients with mid-stage esophageal cancer who have the above symptoms are recommended to go to the hospital in time, cooperate with doctors for active treatment and strengthen daily life management.