A NEW SURGICAL TECHNIÛUE İN EN BLOC RESECTION OF A COSTOVERTEBRAL CORNER CHONDROSARCOMA Journal title: Journal of Turkish Spinal Surgery Authors: Bora GÖKSAN, Azmi HAMZAOĞLU, Cüneyt ŞAR, Levent ERALP, Serper ÇETİNKAYA Subject(s): Medicine, Surgery