Esophageal cancer, i.e. esophageal cancer, the examination items include symptoms, signs, hematological examination, imaging examination, endoscopic examination, and other examinations such as bronchoscopy, etc. It is recommended to consult a specialist. 1. Symptoms: Typical manifestations are progressive dysphagia, choking on drinking water and hoarseness. Foreign body sensation and burning sensation after eating, etc. There may be retrosternal pain, heartburn, belching, etc., and even fever and chest tightness. Malnutrition after eating difficulty, there may be lethargy and fatigue. 2. Signs and symptoms: early stage often has no obvious specific signs, middle and late stage lymph node metastasis can have neck or supraclavicular lymph node enlargement, liver metastasis can have jaundice, hepatic tenderness, malignant ascites or peritoneal metastasis can have abdominal wall tension increase, mobile turbidity on percussion, etc., and malnutrition can be found in the severe cases. 3. Hematological examination: such as blood routine, blood biochemistry, coagulation function, etc. It can also be combined with tumor markers. 4. Imaging examination: such as CT, MRI, upper gastrointestinal imaging, positron emission computed tomography, etc., which can be used to assist staged diagnosis. 5. Endoscopic examination: such as esophageal plain light microscopy, esophageal pigmented endoscopy, special endoscopic technique, esophageal ultrasonic endoscopy, etc., combined with pathological biopsy is the gold standard for confirming the diagnosis of esophageal cancer. Those who are suspected of esophageal cancer are recommended to have timely examination and active treatment.