scholarly journals Magnetic resonance imaging evaluation of common peroneal nerve injury in acute and subacute posterolateral corner lesion: a retrospective study

2021 ◽  
Vol 54 (5) ◽  
pp. 303-310
Author(s):  
Gustavo Felix Marconi ◽  
Marcelo Novelino Simão ◽  
Fabricio Fogagnolo ◽  
Marcello Henrique Nogueira-Barbosa
Keyword(s):  
Patient Group ◽  
Peroneal Nerve ◽  
Interobserver Agreement ◽  
Kappa Statistic ◽  
Common Peroneal Nerve ◽  
Posterolateral Corner ◽  
Control Group ◽  
Resonance Imaging ◽  
Signal Ratio ◽  
Cutoff Value

Abstract Objective: To evaluate qualitative and quantitative magnetic resonance imaging (MRI) criteria for injury of the common peroneal nerve (CPN) in patients with acute or subacute injuries in the posterolateral corner (PLC) of the knee, as well as to evaluate the reproducibility of MRI evaluation of CPN alterations. Materials and Methods: This was a retrospective study of 38 consecutive patients submitted to MRI and diagnosed with acute or subacute injury to the PLC of the knee (patient group) and 38 patients with normal MRI results (control group). Two musculoskeletal radiologists (designated radiologist A and radiologist B, respectively) evaluated the images. Nerve injury was classified as neurapraxia, axonotmesis, or neurotmesis. Signal strength was measured at the CPN, the tibial nerve (TN), and a superficial vein (SV). The CPN/TN and CPN/SV signal ratios were calculated. The status of each PLC structure, including the popliteal tendon, arcuate ligament, lateral collateral ligament, and biceps tendon, was classified as normal, partially torn, or completely torn, as was that of the cruciate ligaments. For the semiquantitative analysis of interobserver agreement, the kappa statistic was calculated, whereas a receiver operating characteristic (ROC) curve was used for the quantitative analysis. Results: In the patient group, radiologist A found CPN abnormalities in 15 cases (39.4%)-neurapraxia in eight and axonotmesis in seven-whereas radiologist B found CPN abnormalities in 14 (36.8%)-neurapraxia in nine and axonotmesis in five. The kappa statistic showed excellent interobserver agreement. In the control group, the CPN/TN signal ratio ranged from 0.63 to 1.1 and the CPN/SV signal ratio ranged from 0.16 to 0.41, compared with 1.30-4.02 and 0.27-1.08, respectively, in the patient group. The ROC curve analysis demonstrated that the CPN/TN signal ratio at a cutoff value of 1.39 had high (93.3%) specificity for the identification of nerve damage, compared with 81.3% for the CPN/SV signal ratio at a cutoff value of 0.41. Conclusion: CPN alterations are common in patients with PLC injury detected on MRI, and the level of interobserver agreement for such alterations was excellent. Calculating the CPN/TN and CPN/SV signal ratios may increase diagnostic confidence. We recommend systematic analysis of the CPN in cases of PLC injury.

Displacement of the common peroneal nerve in posterolateral corner injuries of the knee

2005 ◽  
Vol 87-B (9) ◽  
pp. 1225-1226 ◽  
Author(s):  
N. Bottomley ◽  
A. Williams ◽  
R. Birch ◽  
A. Noorani ◽  
A. Lewis ◽  
...  
Keyword(s):  
Peroneal Nerve ◽  
Common Peroneal Nerve ◽  
Posterolateral Corner ◽  
The Common

White matter lesions in magnetic resonance imaging of the brain in 56 patients with visual vertigo

2018 ◽  
Vol 132 (06) ◽  
pp. 550-553 ◽  
Author(s):  
P A Dimitriadis ◽  
M Saad ◽  
M S Igra ◽  
R Mandavia ◽  
C Bowes ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
White Matter ◽  
Magnetic Resonance ◽  
Patient Group ◽  
White Matter Lesions ◽  
Control Group ◽  
Resonance Imaging ◽  
And Gender ◽  
Visual Vertigo ◽  
The Brain

AbstractBackgroundVisual vertigo is defined as a condition in which there is worsening or triggering of vestibular symptoms in certain visual environments. Previous studies have associated visual vertigo with an increased prevalence of underlying white matter lesions on brain imaging.MethodThis study evaluated the magnetic resonance imaging scans of the brain from a cohort of patients with visual vertigo, and compared the outcomes to an age- and gender-matched group of healthy volunteers.Results and conclusionWhite matter lesions were observed in 17.9 per cent of the patient group and in 16.3 per cent of the control group. The prevalence of white matter lesions in the patient group was not too different to that expected based on age.

Matched-Pair Analysis of Magnetic Resonance Images for Location of the Common Peroneal Nerve in Valgus Knees: Comparison with the Varus Knees

2020 ◽  
Author(s):  
Kwang Am Jung ◽  
Oog-Jin Shon ◽  
Mohd Irfan Banday ◽  
Abhishek Patil ◽  
Gi Beom Kim
Keyword(s):  
Magnetic Resonance ◽  
Subgroup Analysis ◽  
Peroneal Nerve ◽  
Common Peroneal Nerve ◽  
Matched Pair ◽  
Soft Tissue Release ◽  
Control Group ◽  
Matched Pair Analysis ◽  
The Common ◽  
Pair Analysis

AbstractThis study aimed to assess the distance and angular location of the common peroneal nerve (CPN) on axial magnetic resonance imaging (MRI) in the valgus knees and compare the measurements with those obtained from the control group. We compared the location of the CPN according to the type of alignment by performing a subgroup analysis. From January 2009 to December 2019, we identified 41 knees with preoperative MRI in patients who underwent total knee arthroplasty (TKA) for valgus deformity (valgus group). We performed one-to-two matched-pair analysis to a cohort of patients who underwent MRI but were not candidates for TKA (control group), according to sex and age. The valgus group was classified according to the grading system reported by Ranawat et al, and the control group was also subdivided according to the hip-knee-ankle (HKA) angle obtained from lower extremity scanography: neutral (–3 to +3 degrees from the neutral mechanical axis), valgus (> +3 degrees), and varus alignment (< –3 degrees). Distance between the CPN and posterolateral cortex of the tibia at the knee joint (distance J) and tibial cut level (distance C) were measured. Angle of the CPN from the central anteroposterior axis of the tibia (angle α) was measured. We compared the measurements between the groups. Distance J was significantly closer in the valgus group (p < 0.001), whereas angle α was significantly smaller in the valgus group (p < 0.001). However, no significant differences were found in the subgroup analysis. Moreover, a significant correlation was found between distance J and the HKA angle (p < 0.001). The location of the CPN in the valgus knees was closer to the posterolateral cortex of the tibia at the joint level and showed a smaller angle than that in the other aligned knees. We recommend that lateral soft tissue release for valgus knees should not be performed at the joint line. The results of this study suggest that this would be less safe than a release performed at the level of the proximal tibial bone resection.

scholarly journals Degree of disability, pain levels, muscle strength, and electromyographic function in patients with Hansen's disease with common peroneal nerve damage

2012 ◽  
Vol 45 (3) ◽  
pp. 375-379 ◽  
Author(s):  
Larissa Sales Téles Véras ◽  
Rodrigo Gomes de Souza Vale ◽  
Danielli Braga de Mello ◽  
José Adail Fonseca de Castro ◽  
Vicente Lima ◽  
...  
Keyword(s):  
Muscle Strength ◽  
Peroneal Nerve ◽  
Common Peroneal Nerve ◽  
Negative Influence ◽  
Pain Scale ◽  
Nerve Damage ◽  
Control Group ◽  
Control Subjects ◽  
Degree Of Disability ◽  
The Right

INTRODUCTION: This study evaluated the degree of disability, pain levels, muscle strength, and electromyographic function (RMS) in individuals with leprosy. METHODS: We assessed 29 individuals with leprosy showing common peroneal nerve damage and grade 1 or 2 disability who were referred for physiotherapeutic treatment, as well as a control group of 19 healthy participants without leprosy. All subjects underwent analyses of degree of disability, electromyographic tests, voluntary muscle force, and the Visual Analog Pain Scale. RESULTS: McNemar's test found higher levels of grade 2 of disability (Δ = 75.9%; p = 0.0001) among individuals with leprosy. The Mann-Whitney test showed greater pain levels (Δ = 5.0; p = 0.0001) in patients with leprosy who had less extension strength in the right and left extensor hallucis longus muscles (Δ = 1.28, p = 0.0001; Δ = 1.55, p = 0.0001, respectively) and dorsiflexion of the right and left feet (Δ = 1.24, p = 0.0001; Δ = 1.45, p = 0.0001, respectively) than control subjects. The Kruskal-Wallis test showed that the RMS score for dorsiflexion of the right (Δ = 181.66 m·s-2, p = 0.001) and left (Δ = 102.57m·s-2, p = 0.002) feet was lower in patients with leprosy than in control subjects, but intragroup comparisons showed no difference. CONCLUSIONS: Leprosy had a negative influence on all of the study variables, indicating the need for immediate physiotherapeutic intervention in individuals with leprosy. This investigation opens perspectives for future studies that analyze leprosy treatment with physical therapeutic intervention.

scholarly journals Association between cam-type femoroacetabular impingement and osteitis pubis in non-athletic population on magnetic resonance imaging

2019 ◽  
Vol 14 (1) ◽  
Author(s):  
Ayşe Serap Akgün ◽  
Mehmet Agirman
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Patient Group ◽  
Femoroacetabular Impingement ◽  
Alpha Angle ◽  
Hip Pain ◽  
Control Group ◽  
Resonance Imaging ◽  
Osteitis Pubis ◽  
The Right

Abstract Background Osteitis pubis (OP) is a common source of groin and extra-articular hip pain and is associated with intra-articular hip pathology. In this study, we aimed to determine the prevalence of osteitis pubis on magnetic resonance imaging (MRI) in non-athletic patients with cam-type femoroacetabular impingement (FAI). Methods This retrospective cross-sectional study included 178 subjects: 90 patients with cam-type FAI diagnosed by MRI and 88 subjects used as a control group. Additionally, their MRI data were analyzed for the characteristics of osteitis pubis, with severity graded from minimal to severe on a four-point scale. Results A total of 98 patients and 88 controls were studied. Seventy-two males (80%) and 18 females (20%) were the patient group, whereas 71 males (80.68%) and 17 females (19.32%) were the control group. The mean alpha angle of the patients with FAI was 65.8 ± 3.3° in the right side and 66.2 ± 3.2° in the left side, whereas in the control group, it was 47 ± 5.6° in the right side and 47.8 ± 5.2° in the left side. Alpha angle measurements were significantly higher in the patient group than the control group (p < 0.001). A statistically significant increase in the prevalence of osteitis pubis was found in patients with cam-type FAI (45.56%) compared to control subjects (5.68%) (p < 0.001). Conclusions This study demonstrated that the frequency of osteitis pubis was increased in non-athletic patients with FAI syndrome. Further studies are required to determine whether these findings reflect the clinical symptoms in patients with hip pain.

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