Upper middle esophageal cancer belongs to malignant tumors and has a certain severity. The severity of the disease is also related to the stage of the tumor and other factors, for example, advanced upper middle esophageal cancer is more serious than early stage upper middle esophageal cancer, but its severity cannot be generalized. Upper middle esophageal cancer may destroy the surrounding normal tissues and may have distant metastasis, which affects the survival period of patients compared with benign diseases and has a certain degree of severity, but it is not yet possible to fully understand the severity purely based on the nature and location of the disease. Tumor stage, degree of differentiation, patient’s age, and tolerance to treatment may all affect patient survival. The later the stage, the less differentiated the tumor is, the older the patient is, and the less tolerant the patient is to treatment will shorten the survival period. It is recommended to consult a hospital in time for a comprehensive evaluation and standardized treatment under the guidance of a doctor, so that early detection and early treatment can avoid delaying the condition.