- You will have an endoscopy of your esophagus to check the status of the disease during every follow-up visit in Year 1. After that, you will have an endoscopy of your esophagus at follow-up visits anytime the doctor decides it is needed. You will have 1 or more tumor biopsies at these follow-up visits if the doctor decides they are needed, based on the status and location of the disease. This will be decided at the time of the endoscopy.