Esophageal cancer is clinically known as esophageal cancer. For such a disease as esophageal cancer, it is not recommended to check yourself at home because the nature of the disease itself and the lack of your own knowledge can easily delay the treatment of esophageal cancer. And there is no such thing as 7 ways of esophageal cancer self-examination in clinical practice. The correct examination method for esophageal cancer is to seek medical treatment when you find out the disease related manifestations, and the doctor will analyze and decide whether to confirm the diagnosis based on the examination results. Esophageal cancer is usually divided into early stage, middle stage and late stage, and there are certain differences in disease related manifestations in different stages. Patients with early stage esophageal cancer may have choking sensation when eating, and may experience discomfort such as stuffiness and swelling behind the sternum, dryness and tightness in the throat, and foreign body sensation may occur in some patients. Typical symptoms of patients with mid-stage and advanced esophageal cancer are progressive dysphagia with obvious pain, hoarseness and swelling in the neck and clavicle if there are distant metastases and tumor compression. When patients feel the above symptoms, they should go to the hospital for professional examination. The hospital will generally use clinical diagnosis, laboratory examination, imaging examination and pathological examination to clarify the diagnosis. Clinical diagnosis mainly involves doctors’ judgment based on the patient’s condition; laboratory diagnosis usually involves checking tumor markers to clarify the type of tumor as an auxiliary judgment; imaging examination includes X-ray examination, endoscopy, ultrasound and CT examination, etc. X-ray examination can usually be used for esophageal cancer screening to improve the early diagnosis rate; gastroscopy can remove pathological tissues for biopsy; esophageal endoscopy can Gastroscopy can remove pathological tissues for biopsy; esophageal endoscopy can see the location and condition of tumor in esophagus and determine whether tumor has metastasized; CT examination can determine the relationship between esophagus and surrounding tissues. Pathological diagnosis mainly includes cytological examination and esophageal exfoliative cell examination. Combined with the results of laboratory examination, imaging examination and pathological diagnosis, it can clearly diagnose whether the patient has esophageal cancer or not.