A 47 year-old male presents with chronic back pain and lower left leg radiculitis. A laminectomy is performed on the inferior end of l5. The microscope is used to perform microdissection. There was a large extradural cystic structure on the right side underneath the nerve root as well as the left. The entire intraspinal lesion was evacuated. What cpt® code(s) is/are reported for this procedure?