Correlation between MRI Grading System and Surgical Findings for Lumbar Foraminal Stenosis
Journal of Korean Neurosurgical Society
;
: 465-470, 2017.
Article
in English
| WPRIM
| ID: wpr-224187
ABSTRACT
OBJECTIVE:
Magnetic resonance imaging (MRI) grading systems using sagittal images are useful for evaluation of lumbar foraminal stenosis. We evaluated whether such a grading system is useful as a diagnostic tool for surgery.METHODS:
Between July 2014 and June 2015, 99 consecutive patients underwent unilateral lumbar foraminotomy for lumbar foraminal stenosis. Surgically confirmed foraminal stenosis and the contralateral, asymptomatic neuroforamen were assessed based on a 4-point MRI grading system. Two experienced researchers independently evaluated the MR sagittal images. Interobserver agreement and intraobserver agreement were analyzed using κ statistics.RESULTS:
The mean age of patients (54 women, 45 men) was 62.5 years. A total of 101 levels (202 neuroforamens) were evaluated. MRI grades for operated neuroforamens were as follows Grade 0 in 0.99%, Grade 1 in 5.28%, Grade 2 in 14.85%, and Grade 3 in 78.88%. Interobserver agreement was moderate for operated neuroforamens (κ=0.511) and good for asymptomatic neuroforamens (κ=0.696). Intraobserver agreement by reader 1 for operated neuroforamens was good (κ=0.776) and that for asymptomatic neuroforamens was very good (κ=0.831). In terms of lumbar level, interobserver agreement for L5–S1 (κ=0.313, fair) was relatively lower than the other level (κ=0.804, very good).CONCLUSION:
MRI grading system for lumbar foraminal stenosis is thought to be useful as a diagnostic tool for surgery in the lumbar spine; however, it is less reliable for symptomatic L5–S1 foraminal stenosis than for other levels. Thus, various clinical factors as well as the MRI grading system are required for surgical decision-making.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Spinal Stenosis
/
Spine
/
Magnetic Resonance Imaging
/
Constriction, Pathologic
/
Foraminotomy
/
Lumbar Vertebrae
Type of study:
Diagnostic study
/
Prognostic study
Limits:
Female
/
Humans
Language:
English
Journal:
Journal of Korean Neurosurgical Society
Year:
2017
Type:
Article
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