The best and clearest method for screening esophageal cancer is still gastroscopy, which can also be referred to as esophagoscopy. Endoscopic examination is very significant for this type of luminal tumor. Of course, if some people truly cannot tolerate a gastroscopic exam, they might consider initially undergoing a barium meal for the esophagus or iodized oil radiography for diagnosis. Additionally, a chest CT scan can be performed to determine whether there is narrowing in the esophageal lumen or if there is metastasis in the surrounding lymph nodes, among other issues. However, the best and most important method is certainly the esophagoscopy, or taking a biopsy of the pathological tissue under gastroscopy, which is very important for the definitive diagnosis of esophageal cancer.