Laryngoscopy does not detect esophageal cancer. The main examination sites of laryngoscopy are root of tongue, epiglottis, vocal cords, upper trachea, back wall of throat and so on. The scope of examination does not include the esophagus, and esophageal cancer is a malignant tumor that occurs between the entrance of the esophagus and the cardia of the stomach, so laryngoscopy cannot detect esophageal cancer. If you want to check the lesions in the esophagus, there are options such as gastroscopy, esophagography, CT, etc. If a tumor is found during the examination, further biopsies should be taken to make pathology slides for a clear diagnosis. If there is no abnormality in laryngoscopy, but there are symptoms such as difficulty in swallowing, acid reflux, burning tingling behind the sternum, hiccups, epigastric discomfort, etc., you should be alert to gastrointestinal lesions, and it is recommended that you go to the gastroenterology department of the hospital, where the doctor will combine the symptoms, signs, and history of the disease with the comprehensive judgment, and choose the appropriate auxiliary examination methods to help clarify whether there is a lesion in the esophagus. If you are experiencing discomfort, consult a doctor in a timely manner and take active treatment to avoid delaying your condition.