| Home | E-Submission | Sitemap | Editorial Office |  
top_img
Journal of Korean Neurosurgical Society 1997;26(9): 1272-1281.
Diagnosis and Management of Os Odontoideum.
Seong Min Kim, Do Heum Yoon, Yong Eun Cho, Young Soo Kim
Department of Neurosurgery, College of Medicine, Yonsei University, Seoul, Korea.
ABSTRACT
The authors analyzed 17 cases of os odontoideum. a very rare condition and one of the causes of atlantoaxial instability. We investigated the radiographic findings of os odontoideum and classified the patients according to clinical grade, radiographic findings and direction of atlantoaxial instability. Their mean age was 33.4 years, and the male to female ratio was. 7: 10. Thirteen patients(76.5%) were classified as clinical grade 3, indicating fixed or progressive myelopathy. They were classified as one of two types, according to the location of the os, five were dystopic and ten were orthotopic. In remaining two patients, it was difficult to classify. We measured SAC(space available for cord) laterally, using plain film, and sagittally, using MR imaging, and compared the results with clinical symptoms. SAC as seen on cervical MRI, correlated more closely with severity of cord compression than did SAC seen on plain film. The 15 patients underwent various operative methods including C1/2 fixation, occipito-cervical fusion, and transoral decompression; because of postoperative hardware failure, two required further surgery. Postoperatively, twelve patients showed excellent or good neurologic improvement. In this retrospective study, SAC seen on cervical MRI was a very good indicator of the need for surgery, and surgery should be considered in patients whose clinical grade is higher than 2.
Key Words: Os odontoideum; Atlantoaxial instability; SAC(Space Available for Cord)
TOOLS
Full text via DOI  Full text via DOI
Download Citation  Download Citation
Share:      
METRICS
1,237
View
18
Download
Related articles
Surgical Management of Pituitary Tumors.  1984 December;13(4)
Diagnosis and Treatment of Pituitary Apoplexy.  1987 September;16(3)
Nonoperative Management of Acute Epidural Hematoma.  1988 August;17(4)
Calcium Antagonist in the Management of Aneurysmal Subarachnoid Hemorrhage Patient.  1993 February;22(2)
Diagnosis and Management of the Vertebrobasilar Dissecting Aneurysm.  1995 June;24(6)
Editorial Office
1F, 18, Heolleung-ro 569-gil, Gangnam-gu, Seoul, Republic of Korea
TEL: +82-2-525-7552   FAX: +82-2-525-7554   E-mail: office@jkns.or.kr
About |  Browse Articles |  Current Issue |  For Authors and Reviewers
Copyright © Korean Neurosurgical Society.                 Developed in M2PI
Close layer