label: Transcondylar approach to midline skull base with occipital condylectomy, mastoidectomy, resection of C1-C3 vertebral body, and decompression and mobilization of vertebral artery
label_lc: transcondylar approach to midline skull base with occipital condylectomy, mastoidectomy, resection of c1-c3 vertebral body, and decompression and mobilization of vertebral artery