Department of Orthopedics Provincial Hospital Affiliated to Anhui Medical University Hefei 230001 Anhui Province China;
Spine Center Department of Orthopedics Provincial Hospital Affiliated to Anhui Medical University Hefei 230001 Anhui Province China;
Ankylosing spondylitis; Dysphagia; Giant osteophyte; Cervical spine; Anterior cervical discectomy and fusion; Case report;