Korean J Spine.  2012 Sep;9(3):289-292. 10.14245/kjs.2012.9.3.289.

Delayed Pharyngeal Extrusion of an Anterior Odontoid Screw

Affiliations
  • 1Department of Neurological Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea. scrhim@amc.seoul.kr
  • 2Department of Otolaryngology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.

Abstract

A 27-year-old woman with a type II odontoid fracture was treated by anterior odontoid screw fixation. Radiographic union at the fracture site was obtained 3 months after surgery. Nearly 3 years after surgery, she presented at a local Ear, Nose, and Throat (ENT) clinic with a 2-month history of dysphagia. Laryngoscopy identified the head of the odontoid lag screw. Plain radiography showed that the head of the screw had migrated into the pharyngeal soft tissue. The atlantoaxial joint was stable, and computed tomography (CT) scans confirmed odontoid fracture fusion. The screw was found to be movable during endoscopy. The screw could be removed by using a transpharyngeal endoscopic approach under general anesthesia. The failure of the screw was considered to be due in part to malpositioning of the screw and in part to local infection. A transoropharyngeal endoscopic approach to remove the loose anterior odontoid screw was feasible.

Keyword

Odontoid process; Fracture fixation; Postoperative complications; Esophageal perforation

MeSH Terms

Adult
Anesthesia, General
Atlanto-Axial Joint
Deglutition Disorders
Ear
Endoscopy
Esophageal Perforation
Female
Fracture Fixation
Head
Humans
Laryngoscopy
Nose
Odontoid Process
Pharynx
Postoperative Complications
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