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Odontoid compression of the brainstem without basilar impression-- "odontoid invagination".
J Clin Neurosci. 2005 Jun; 12(5):565-9.JC

Abstract

We report five patients with odontoid invagination, in which the odontoid process bulges upward into the foramen magnum and compresses the brainstem without deformity of the occipital bone. Two patients had a craniovertebral abnormality associated with Chiari malformation without instability of the craniovertebral junction (stable odontoid invagination). The other three patients had dislocation of the craniovertebral junction due to iatrogenic destruction of the occipital condyle, rheumatoid arthritis or an anomaly of C2 (unstable odontoid invagination). Patients with stable odontoid invagination underwent a transoral odontoidectomy followed by occipitocervical fixation. Those with unstable odontoid invagination underwent cervical traction followed by posterior fixation in reducible cases, while in irreducible cases odontoidectomy with subsequent occipitocervical fixation was performed. Decompression of the neuraxis together with symptomatic improvement was achieved in all patients and none became unstable or developed new symptoms during follow-up ranging from 3 to 15 years.

Authors+Show Affiliations

Department of Neurosurgery, Shinshu University School of Medicine, Matsumoto, Japan. kakyosh@av4.mopera.ne.jpNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Case Reports
Journal Article

Language

eng

PubMed ID

16051095

Citation

Kyoshima, Kazuhiko, et al. "Odontoid Compression of the Brainstem Without Basilar Impression-- "odontoid Invagination"." Journal of Clinical Neuroscience : Official Journal of the Neurosurgical Society of Australasia, vol. 12, no. 5, 2005, pp. 565-9.
Kyoshima K, Kakizawa Y, Tokushige K, et al. Odontoid compression of the brainstem without basilar impression-- "odontoid invagination". J Clin Neurosci. 2005;12(5):565-9.
Kyoshima, K., Kakizawa, Y., Tokushige, K., Akaishi, K., Kanaji, M., & Kuroyanagi, T. (2005). Odontoid compression of the brainstem without basilar impression-- "odontoid invagination". Journal of Clinical Neuroscience : Official Journal of the Neurosurgical Society of Australasia, 12(5), 565-9.
Kyoshima K, et al. Odontoid Compression of the Brainstem Without Basilar Impression-- "odontoid Invagination". J Clin Neurosci. 2005;12(5):565-9. PubMed PMID: 16051095.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Odontoid compression of the brainstem without basilar impression-- "odontoid invagination". AU - Kyoshima,Kazuhiko, AU - Kakizawa,Yukinari, AU - Tokushige,Kazuo, AU - Akaishi,Kotaro, AU - Kanaji,Miki, AU - Kuroyanagi,Takayuki, PY - 2003/10/22/received PY - 2004/07/28/accepted PY - 2005/7/30/pubmed PY - 2006/5/23/medline PY - 2005/7/30/entrez SP - 565 EP - 9 JF - Journal of clinical neuroscience : official journal of the Neurosurgical Society of Australasia JO - J Clin Neurosci VL - 12 IS - 5 N2 - We report five patients with odontoid invagination, in which the odontoid process bulges upward into the foramen magnum and compresses the brainstem without deformity of the occipital bone. Two patients had a craniovertebral abnormality associated with Chiari malformation without instability of the craniovertebral junction (stable odontoid invagination). The other three patients had dislocation of the craniovertebral junction due to iatrogenic destruction of the occipital condyle, rheumatoid arthritis or an anomaly of C2 (unstable odontoid invagination). Patients with stable odontoid invagination underwent a transoral odontoidectomy followed by occipitocervical fixation. Those with unstable odontoid invagination underwent cervical traction followed by posterior fixation in reducible cases, while in irreducible cases odontoidectomy with subsequent occipitocervical fixation was performed. Decompression of the neuraxis together with symptomatic improvement was achieved in all patients and none became unstable or developed new symptoms during follow-up ranging from 3 to 15 years. SN - 0967-5868 UR - https://www.unboundmedicine.com/medline/citation/16051095/Odontoid_compression_of_the_brainstem_without_basilar_impression___"odontoid_invagination"_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0967-5868(05)00119-0 DB - PRIME DP - Unbound Medicine ER -