Changes in retro-odontoid mass after upper cervical spine surgery

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Abstract

A non-neoplastic mass posterior to the dens is termed a retro-odontoid mass (R-OM). This retrospective study evaluated radiographic and clinical outcomes and R-OM changes after upper cervical spine surgery. This study included 69 patients who underwent upper cervical spine surgery, including atlantoaxial fusion, occipitocervical fusion, or decompression. All patients underwent preoperative magnetic resonance imaging (MRI). Six-month follow-up MRI examinations were performed in 30 patients who had preoperative R-OMs. Radiographic outcomes of the anterior and posterior atlantodental intervals were measured using X-rays and computed tomography. The R-OM and space available for the cord (SAC) were measured using MRI. Clinical outcomes were evaluated using neck and arm pain visual analog scales, the Japanese Orthopedic Association score, the neck disability index, and the patient-reported subjective improvement rate. The anterior atlantodental interval decreased, while the posterior atlantodental interval and SAC increased postoperatively. Among the clinical outcomes, the neck and arm pain and the neck disability index decreased postoperatively, while the Japanese Orthopedic Association score increased. All clinical and radiographic outcomes improved postoperatively. The R-OM either decreased in size or disappeared after fusion surgery in all cases, except in one patient who underwent decompression surgery. In conclusion, stabilization through fusion surgery is essential for treating R-OM.

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Most cited references 35

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A Review of the Diagnosis and Treatment of Atlantoaxial Dislocations

Sun Yang, Anthony Boniello, Caroline Poorman … (2014)

Study Design Literature review. Objective Atlantoaxial dislocation (AAD) is a rare and potentially fatal disturbance to the normal occipital-cervical anatomy that affects some populations disproportionately, which may cause permanent neurologic deficits or sagittal deformity if not treated in a timely and appropriate manner. Currently, there is a lack of consensus among surgeons on the best approach to diagnose, characterize, and treat this condition. The objective of this review is to provide a comprehensive review of the literature to identify timely and effective diagnostic techniques and treatment modalities of AAD. Methods This review examined all articles published concerning “atlantoaxial dislocation” or “atlantoaxial subluxation” on the PubMed database. We included 112 articles published between 1966 and 2014. Results Results of these studies are summarized primarily as defining AAD, the normal anatomy, etiology of dislocation, clinical presentation, diagnostic techniques, classification, and recommendations for timely treatment modalities. Conclusions The Wang Classification System provides a practical means to diagnose and treat AAD. However, future research is required to identify the most salient intervention component or combination of components that lead to the best outcomes.

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Rheumatoid arthritis of the cervical spine--clinical considerations.

Paula B. Wasserman, E Razi, Ronald Moskovich (2010)

Rheumatoid arthritis (RA) is a chronic, systemic inflammatory disorder affecting multiple organ systems, joints, ligaments, and bones and commonly involves the cervical spine. Chronic synovitis may result in bony erosion and ligamentous laxity that result in instability and subluxation. Anterior atlantoaxial subluxation (AAS) is the most frequently occurring deformity, due to laxity of the primary and secondary ligamentous restraints. Additional manifestations of RA include cranial settling, subaxial subluxation, or a combination of these. Although clinical findings can be confounded by the severity of multifocal joint and systemic involvement, a careful history is critical to identify symptoms of cervical disease; serial physical examination is the best noninvasive diagnostic tool. Thorough physical and neurologic examinations should be performed in all patients and serial functional assessments charted. Radiographs of the cervical spine with lateral flexion-extension dynamic views should be obtained periodically and used to "clear" the cervical spine before elective surgery requiring general anesthesia. Advanced imaging, such as magnetic resonance imaging (MRI) or myelography and computed tomography (CT), may be necessary to evaluate the neuraxis. Early initiation of pharmacotherapy may slow progression of rheumatoid cervical disease. Operative intervention before the onset of advanced myelopathy results in improved outcomes compared to the surgical stabilization of patients whose conditions are more advanced. A multidisciplinary approach involving rheumatology, surgery, and rehabilitation is beneficial to optimize outcomes.

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Occipitocervical fusion with rigid internal fixation: long-term follow-up data in 69 patients.

Andrew S Kanter, Syed S Azeem, J York … (2007)

Instability of the occipitocervical junction may result from degenerative disease, infection, tumor, and trauma. Surgical stabilization involving screw fixation and rigid implants has been found to be biomechanically superior to wire-based implants. To evaluate the long-term results in a large and diverse patient population, the authors prospectively studied a consecutive group of 69 patients. All patients underwent occipitocervical fusion in which rigid posterior instrumentation included either plates or rods and screws. Patients ranged in age from 11 to 90 years (mean 51.4 years); there were 34 female and 35 male patients. The mean follow-up duration was 37 months (range 6-66 months). Fifty-seven (83%) of the 69 patients had long-standing occipitocervical anomalies, whereas the remainder presented with acute instability. Basilar invagination was present in 20 patients. Correction of a severe cervical kyphotic deformity was accomplished in six patients. There were no fatalities or medical complications associated with the procedures. During the follow-up period, 87% of the patients exhibited improvement in their myelopathic symptoms; in 13% the symptoms were unchanged. Complications were minimal. Stability was demonstrated on flexion/extension studies in all cases. There were no treatment-related deaths, although four patients died within the follow-up period, all due to progression of metastatic disease. The authors found that rigid internal fixation of the occipitocervical complex was safe, effective, and technically possible for spine surgeons familiar with occipital bone anatomy and lateral mass fixation.

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Author and article information

Contributors

Kyung-Soo Suk: sks111@yuhs.ac

Journal

Journal ID (nlm-ta): Sci Rep

Journal ID (iso-abbrev): Sci Rep

Title: Scientific Reports

Publisher: Nature Publishing Group UK (London )

ISSN (Electronic): 2045-2322

Publication date (Electronic): 21 November 2022

Publication date PMC-release: 21 November 2022

Publication date Collection: 2022

Volume: 12

Electronic Location Identifier: 20035

Affiliations

[1 ]GRID grid.416665.6, ISNI 0000 0004 0647 2391, Department of Orthopedic Surgery, , National Health Insurance Service Ilsan Hospital, ; 100 Ilsan-ro, Goyang, 10444 Republic of Korea

[2 ]GRID grid.15444.30, ISNI 0000 0004 0470 5454, Department of Orthopedic Surgery, , Yonsei University College of Medicine, ; 211 Eonju-ro, Gangnam-gu, Seoul, 06273 Republic of Korea

Article

Publisher ID: 24436

DOI: 10.1038/s41598-022-24436-7

PMC ID: 9681733

PubMed ID: 36414738

SO-VID: 11f20975-86c5-4739-a642-da9d1522207d

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Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

History

Date received : 25 February 2022

Date accepted : 15 November 2022

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Keywords: diseases,medical research

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ScienceOpen disciplines: Uncategorized

Keywords: diseases, medical research

Changes in retro-odontoid mass after upper cervical spine surgery

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International Journal of Medicine and Medical Research

Most cited references 35

A Review of the Diagnosis and Treatment of Atlantoaxial Dislocations

Rheumatoid arthritis of the cervical spine--clinical considerations.

Occipitocervical fusion with rigid internal fixation: long-term follow-up data in 69 patients.

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