If a tumor is not found on the opposite side of your chest from another tumor by the EBUS, you will then have a mediastinoscopy. This is also an outpatient procedure that will involve a small (2 cm) cut at the base of the neck, just above the breast bone. Your doctor will then pass a special scope with a camera into your chest (below the breast bone). This will allow your doctor to see the lymph glands around your windpipe and get samples of them. This will also be performed under general anesthesia and you will be able to leave the hospital shortly after the procedure.