Evaluation of Occipitocervical Subluxation in Rheumatoid Arthritis Patients, Using Coronal-View Reconstructive Computed Tomography

Nagayoshi, Ryusaku; Ijiri, Kosei; Takenouchi, Tsuyoshi; Taketomi, Eiji; Sakakima, Harutoshi; Komiya, Setsuro

doi:10.1097/brs.0b013e3181b26cc9

Cited by 8 publications

(7 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Redlund-Johnell, Ranawat method and M-Ranawat method are measures of the spatial relationship between C1 and C2 rather than the more critical occiput-C2 relationship6). Basically, basilar invagination pathophysiologic consequence was mainly induced by C1-2 articulation than occiput-C110).…”

Section: Discussionmentioning

confidence: 99%

Analysis of Measurement Accuracy for Craniovertebral Junction Pathology : Most Reliable Method for Cephalometric Analysis

Lee

Hong

Kim

et al. 2013

J Korean Neurosurg Soc

View full text Add to dashboard Cite

ObjectiveThis study was designed to determine the most reliable cephalometric measurement technique in the normal population and patients with basilar invagination (BI).MethodsTwenty-two lateral radiographs of BI patients and 25 lateral cervical radiographs of the age, sex-matched normal population were selected and measured on two separate occasions by three spine surgeons using six different measurements. Statistical analysis including intraclass correlation coefficient (ICC) was carried out using the SPSS software (V. 12.0).ResultsRedlund-Johnell and Modified (M)-Ranawat had a highest ICC score in both the normal and BI groups in the inter-observer study. The M-Ranawat method (0.83) had a highest ICC score in the normal group, and the Redlund-Johenll method (0.80) had a highest ICC score in the BI group in the intra-observer test. The McGregor line had a lowest ICC score and a poor ICC grade in both groups in the intra-observer study. Generally, the measurement method using the odontoid process did not produce consistent results due to inter and intra-observer differences in determining the position of the odontoid tip. Opisthion and caudal point of the occipital midline curve are somewhat ambiguous landmarks, which induce variable ICC scores.ConclusionOn the contrary to other studies, Ranawat method had a lower ICC score in the inter-observer study. C2 end-plate and C1 arch can be the most reliable anatomical landmarks.

show abstract

Section: Discussionmentioning

confidence: 99%

Analysis of Measurement Accuracy for Craniovertebral Junction Pathology : Most Reliable Method for Cephalometric Analysis

Lee

Hong

Kim

et al. 2013

J Korean Neurosurg Soc

View full text Add to dashboard Cite

show abstract

“…The AOJ is an important anatomic area of the craniocervical junction, and the knowledge of normal range of rotation is important before one embarks upon the diagnosis of AOJ rotary subluxation or dislocation (15)(16)(17)(18). Additionally, the method should be universally available, safe, simple, precise, and reliable.…”

Section: Discussionmentioning

confidence: 99%

Normative data on axial rotation of atlanto-occipital joint on 3 Tesla MRI using a simple and reliable method of calculation

Niu

Guo

et al. 2013

Acta Radiol

View full text Add to dashboard Cite

Background: Various methods have been used to image and measure the normal range of axial rotation of the atlantooccipital joint (AOJ), but a simple, precise, and reliable method is needed for everyday practice. Purpose: To generate normative ranges for AOJ rotation in various in-vivo positions and to investigate the reliability of a simple imaging method for measurement using routine high-field magnetic resonance imaging (MRI). Material and Methods: One hundred healthy volunteers were imaged on 3 T MRI with the AOJ in the center of the field of view. The scans were uniformly performed in seven different positions. The range of axial rotation was calculated by the angle between the craniofacial midline and the line linking the anterior and posterior tubercles of the atlas. The angle was defined as positive when it was angled right, and negative when it was angled left. The actual normative range of axial rotation was the difference between the angle in the supine neutral position and in the other positions. Results: The normative axial rotation range of the AOJ in different positions was between À4.8 and þ5.0 . The mean values of the actual rotation angles in the right supine position with maximum bending, the right supine position maximum rotation, and the right prostrate position maximum rotation were 0.1 , 1.70 , and 0.8 , respectively. The mean values of actual rotation angles in the left supine position with maximum bending, the left supine position with maximum rotation, and the left prostrate positive with maximum rotation were 0.1 , À1.7 , and À1.1 , respectively. The inter-observer reliability tested. Conclusion: A simple and reliable method of measurement on 3.0 T MRI demonstrated the normative axial rotation range of the AOJ in different positions to be between À4.8 and þ5.0 and it was different from zero in neutral rotation. This method could be practically used to precisely diagnose AOJ rotary subluxation or dislocation.

show abstract

“…1-3,11,12 However, these studies are focused on the degenerative alterations of the joint and the development of instability. We do not find any study indicating the need for special precautions did the passage of intralaminar screws in patients with rheumatoid arthritis, such as passage of screws of reduced diameter or length due to deformities in the medullary canal of the C2 laminae.…”

Section: Discussionmentioning

confidence: 99%

Análise tomográfica para colocação de parafusos em C2 nos pacientes com artrite reumatoide

et al. 2012

View full text Add to dashboard Cite

ObjectiveA morphological analysis of the bone structure of C2 in patients with rheumatoid arthritis in order to enhance the security of the stabilization procedures for this vertebra.MethodsWe retrospectively analyzed 20 CT scans of the cervical spine performed in patients with rheumatoid arthritis; the following parameters were measured: spinolaminar angle, thickness and length of C2 lamina.ResultsThe mean values are: 5.92mm and 5.87mm for thickness of right and left laminae retrospectively, 27.75mm for right lamina length and 27.94mm for left lamina length, and 44.7º for spinolaminar angle.ConclusionThe values obtained are consistent with studies in normal subjects published by other groups, with no apparent need for change in the screw placement technique. Level of Evidence IV, Case Series.

show abstract

Evaluation of Occipitocervical Subluxation in Rheumatoid Arthritis Patients, Using Coronal-View Reconstructive Computed Tomography

Abstract: Coronal-view reconstructive CT is useful for the diagnosis of occipitocervical joint subluxation in RA.

Cited by 8 publications

References 20 publications

Analysis of Measurement Accuracy for Craniovertebral Junction Pathology : Most Reliable Method for Cephalometric Analysis

Analysis of Measurement Accuracy for Craniovertebral Junction Pathology : Most Reliable Method for Cephalometric Analysis

Normative data on axial rotation of atlanto-occipital joint on 3 Tesla MRI using a simple and reliable method of calculation

Análise tomográfica para colocação de parafusos em C2 nos pacientes com artrite reumatoide

Contact Info

Product

Resources

About