The life expectancy of esophageal cancer patients depends on several factors such as the stage of the cancer at the time of diagnosis, the patient's sensitivity to treatments like radiotherapy and chemotherapy, the effectiveness of these treatments, the patient's general condition, and whether they have other underlying diseases. Patients who can undergo radical surgery, especially those diagnosed at an early stage, generally have a better prognosis. Patients who respond well to treatment can also expect a better outcome. Therefore, there is significant individual variation in prognosis.