A RARE PRESENTATION OF POLYOSTOTIC FIBROUS DYSPLASIA IN CERVICAL, THORACIC AND LUMBAR SPINE Journal title: Journal of Turkish Spinal Surgery Authors: Yunus Emre AKMAN, Volkan GUR, Mehmet Bülent BALİOGLU, Engin CETİNKAYA, Yavuz S. KABUKCUOGLU Subject(s): Medicine, Surgery