ArticleThe British journal of radiology2017
Sciatic neuromuscular variants on MR neurography: frequency study and interobserver performance.
Article in The British journal of radiology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 1 of them a synthesis that pooled it.
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Who cites it
9 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Anatomical variations of the sciatic nerve and its relationship to the pelvic bone: a systematic review.Surgical and radiologic anatomy : SRA · 2026Pooled it
- Anatomical variations of the sciatic nerve: a literature review on morphology and clinical implications.Anatomical science international · 2026Review
- Article
- Evaluation of the Interrater Reliability of Sonographic Measurements of Muscle Thickness of 38 Piriformis Muscles in 19 Patients with Piriformis Syndrome.Medical science monitor : international medical journal of experimental and clinical research · 2024Article
- An Updated Review of Magnetic Resonance Neurography for Plexus Imaging.Korean journal of radiology · 2023Review
- Variant Sciatic Nerve Anatomy in Relation to the Piriformis Muscle on Magnetic Resonance Neurography: A Potential Etiology for Extraspinal Sciatica.Tomography (Ann Arbor, Mich.) · 2023Article
- Role of MR Neurography for Evaluation of the Lumbosacral Plexus: A Scoping Review.Journal of the Korean Society of Radiology · 2022Article
- Magnetic Resonance Neurography for Evaluation of Peripheral Nerves.Journal of brachial plexus and peripheral nerve injury · 2021Review
- Is it painful to be different? Sciatic nerve anatomical variants on MRI and their relationship to piriformis syndrome.European radiology · 2018Article
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6 authors.
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Abstract
objectiveTo evaluate the frequency of sciatic neuromuscular variants on MR neurography and determine the interobserver variability.
methodsA retrospective evaluation of 137 consecutive lumbosacral plexus magnetic resonance neurography examinations was performed. All examinations were performed using nerve selective 3D imaging and independently reviewed by two readers for the presence of sciatic neuromuscular variants and piriformis muscle asymmetry. Inter- and intraobserver performance were evaluated.
resultsThere were a total of 44/268 (16.4%) extremities with sciatic neuromuscular variants. The interobserver performance in the identification of sciatic nerve variants was excellent (kappa values from 0.8-0.9). There was a total of 45/134 (33.6%) patients with piriformis muscle asymmetry. Of these, 7/134 (5.2%) had piriformis muscle atrophy and 38/134 (28.4%) had piriformis muscle hypertrophy. The interobserver performance in the identification of piriformis muscle atrophy and hypertrophy was moderate to good (kappa values from 0.39-0.61). The intraobserver performance revealed kappa values of 0.735 and 0.821 on right and left, respectively.
conclusionSciatic neuromuscular variants and piriformis muscle asymmetry are frequent on lumbosacral plexus MRN with moderate to excellent interobserver performance. Advances in knowledge: Sciatic neuromuscular variants and piriformis asymmetry on MR neurography are frequent and the prevalence is similar to cumulative prevalence from available scientific series. Interobserver performance for identification of sciatic neuromuscular variants is excellent, and moderate-good for piriformis muscle asymmetry.
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