scholarly journals Diagnosis of ulnar nerve entrapment anterior to the medial epicondyle by ultrasound elastography and diffusion tensor imaging with fiber tractography: a case report

2022 ◽  
Author(s):  
Guillaume Jaques ◽  
Fabio Becce ◽  
Jean-Baptiste Ledoux ◽  
Sébastien Durand
Keyword(s):  
Diffusion Tensor Imaging ◽  
Ulnar Nerve ◽  
Diffusion Tensor ◽  
Medial Epicondyle ◽  
Nerve Entrapment ◽  
Ultrasound Elastography ◽  
Fiber Tractography ◽  
Ulnar Nerve Entrapment ◽  
Compressive Neuropathy ◽  
And Diffusion

AbstractUlnar/cubital tunnel syndrome is the second most common compressive neuropathy of the upper limb. Permanent location of the ulnar nerve anterior to the medial epicondyle is extremely rare, with only five cases reported in the literature. Using ultrasound elastography and diffusion tensor imaging with fiber tractography, we diagnosed a case in which ulnar nerve entrapment was associated with anterior nerve location. Surgical release confirmed the diagnosis and the patient was symptom free 3 months after surgery.

MR neurography of ulnar nerve entrapment at the cubital tunnel: a diffusion tensor imaging study

2015 ◽  
Vol 25 (7) ◽  
pp. 1911-1918 ◽  
Author(s):  
Julia B. Breitenseher ◽  
Gottfried Kranz ◽  
Alina Hold ◽  
Dominik Berzaczy ◽  
Stefan F. Nemec ◽  
...  
Keyword(s):  
Diffusion Tensor Imaging ◽  
Ulnar Nerve ◽  
Diffusion Tensor ◽  
Imaging Study ◽  
Nerve Entrapment ◽  
Cubital Tunnel ◽  
Mr Neurography ◽  
Ulnar Nerve Entrapment ◽  
Diffusion Tensor Imaging Study

scholarly journals Application of fiber tractography and diffusion tensor imaging to evaluate spinal cord diseases in dogs

2017 ◽  
Vol 79 (2) ◽  
pp. 418-424 ◽  
Author(s):  
Yuko KONISHI ◽  
Hiroyuki SATOH ◽  
Yasuyoshi KUROIWA ◽  
Mizuki KUSAKA ◽  
Atsushi YAMASHITA ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Diffusion Tensor Imaging ◽  
Diffusion Tensor ◽  
Fiber Tractography ◽  
Spinal Cord Diseases ◽  
And Diffusion

scholarly journals Anconeus Epitrochlearis Muscle as a Cause of Ulnar Nerve Compression at the Elbow

2017 ◽  
Vol 36 (03) ◽  
pp. 190-193
Author(s):  
Luiz Cannoni ◽  
Luciano Haddad
Keyword(s):  
Surgical Treatment ◽  
Ulnar Nerve ◽  
Complete Recovery ◽  
Nerve Entrapment ◽  
Ulnar Nerve Compression ◽  
Left Hand ◽  
Ulnar Nerve Entrapment ◽  
Compressive Neuropathy ◽  
Tunnel Syndrome ◽  
Magnetic Resonance Imaging Mri

AbstractUlnar nerve entrapment is the second most common compressive neuropathy in the upper limb, after carpal tunnel syndrome (Dellon, 1986). One of the causes that must be considered is the accessory anconeus epitrochlearis muscle, which is present in 4% to 34% of the general population (Husarik et al, 2010; Vanderpool et al, 1968; Nellans et al, 2014).We describe a patient with symptoms of compression of the left ulnar nerve at the elbow and the result of the surgical treatment.The patient presented with hypoesthesia in the fourth and fifth fingers of the left hand, and reduction of strength in the fifth finger abduction. No alterations were found in the thumb adduction.Initially, the treatment was conservative (splint, physiotherapy, analgesics); surgical treatment was indicated due to the continuity of the symptoms.The ulnar nerve was surgically released and transposed, with complete recovery after 6 months of follow-up.Ulnar nerve entrapment at the elbow by the anconeus epitrochlearis muscle is not common, but it must not be ignored (Chalmers, 1978). Ultrasonography (Jung et al, 2013; Bargalló et al, 2010), elbow magnetic resonance imaging (MRI) (Jeon, 2005), and electromyography (Byun, 2011) can help establish the proper diagnosis.

Determination of optimum pixel size and slice thickness for tractography and ulnar nerve diffusion tensor imaging at the cubital tunnel using 3T MRI

2020 ◽  
pp. 028418512095196
Author(s):  
Sun-Young Park ◽  
Sung Hye Koh ◽  
In Jae Lee ◽  
Kwanseop Lee ◽  
Yul Lee
Keyword(s):  
Diffusion Tensor Imaging ◽  
Ulnar Nerve ◽  
Diffusion Tensor ◽  
Nerve Fibers ◽  
Cubital Tunnel ◽  
Slice Thickness ◽  
Fiber Tractography ◽  
Pixel Size ◽  
Cross Sectional ◽  
Visual Score

Background Small peripheral nerve tractography is challenging because of the trade-off among resolution, image acquisition time, and signal-to-noise ratio. Purpose To optimize pixel size and slice thickness parameters for fiber tractography and diffusion tensor imaging (DTI) of the ulnar nerve at the cubital tunnel using 3T magnetic resonance imaging (MRI). Material and Methods Fifteen healthy volunteers (mean age 30 ± 6.8 years) were recruited prospectively. Axial T2-weighted and DTI scans were acquired, covering the cubital tunnel, using different pixel sizes and slice thicknesses. Three-dimensional (3D) nerve tractography was evaluated for the median number and length of the reconstructed fiber tracts and visual score from 0 to 5. Two-dimensional (2D) cross-sectional DTI was evaluated for fractional anisotropy (FA) values throughout the length of the ulnar nerve. Results A pixel size of 1.3 mm2 revealed the highest number of reconstructed nerve fibers compared to that of 1.1 mm2 ( P = 0.048), with a good visual score. A slice thickness of 4 mm had the highest number of reconstructed nerve fibers and visual score compared with other thicknesses (all P < 0.05). In 2D cross-sectional images, the median FA values were in the range of 0.40–0.63 at the proximal, central, and distal portions of the cubital tunnel. Inter-observer agreement for all parameters was good to excellent. Conclusion For fiber tractography and DTI of the ulnar nerve at the cubital tunnel, optimal image quality was obtained using a 1.3-mm2 pixel size and 4-mm slice thickness under MR parameters of this study at 3T.

Infraclavicular Ulnar Nerve Entrapment Due to a Chondroepitrochlearis Muscle

1991 ◽  
Vol 16 (3) ◽  
pp. 315-317 ◽  
Author(s):  
R. J. SPINNER ◽  
S. W. CARMICHAEL ◽  
M. SPINNER
Keyword(s):  
Ulnar Nerve ◽  
Neurological Complication ◽  
Medial Epicondyle ◽  
Pectoralis Major ◽  
Neurovascular Bundle ◽  
Nerve Entrapment ◽  
Crossing Over ◽  
Ulnar Nerve Entrapment

The chondroepitrochlearis muscle is an extremely rare muscle, arising from the pectoralis major, crossing over the neurovascular bundle in the axilla and inserting into the brachial fascia and medial epicondyle of the humerus. This paper presents the first known neurological complication due to the chondroepitrochlearis muscle.

Ulnar Neuropathy—Cubital Tunnel Syndrome

2018 ◽  
Author(s):  
Ron Ron Cheng ◽  
Abhay K. Varma
Keyword(s):  
Ulnar Nerve ◽  
Cubital Tunnel Syndrome ◽  
Medial Epicondyle ◽  
Nerve Entrapment ◽  
Nerve Roots ◽  
Ulnar Nerve Entrapment ◽  
Tunnel Syndrome ◽  
Electrodiagnostic Study ◽  
Typical Scenario

The chapter presents the typical scenario of ulnar nerve entrapment at the elbow. The clinical picture can mimic pathology of nerve roots, of the brachial plexus, or of the ulnar nerve at different sites. Electrodiagnostic study helps to differentiate ulnar nerve entrapment from radiculopathy and to localize the site of compression, while imaging (ultrasound and MR imaging) are useful adjuncts to clinical examination. Conservative management is recommended for intermittent symptoms and absence of motor involvement. Surgical procedures include in situ, open, or endoscopic decompression and nerve transposition. Subluxation of the nerve over the medial epicondyle and recurrent or persistent neuropathy after in situ decompression are indications for transposition.

scholarly journals Unilateral appearance of a chondro-epitrochlearis muscle-a case report

2005 ◽  
Vol 38 (02) ◽  
pp. 164-166
Author(s):  
P Jaijesh
Keyword(s):  
Differential Diagnosis ◽  
Case Report ◽  
Clinical Significance ◽  
Ulnar Nerve ◽  
Pectoralis Major Muscle ◽  
Medial Epicondyle ◽  
Pectoralis Major ◽  
Nerve Entrapment ◽  
Review Of Literature ◽  
Ulnar Nerve Entrapment

AbstractVariant muscle slips from pectoralis major muscle are rare. Among these, the muscle chondro-epitrochlearis is a very rare muscular anomaly. Here, in this report, we describe a similar muscle which had an origin from the lower ribs along with the lower fibres of the pectoralis major muscle, arched across the axilla, and then inserted to the medial epicondyle of humerus. In this report we present a review of literature on this muscle. We also discuss the clinical significance of this muscle since the knowledge of this muscle is important in the differential diagnosis of ulnar nerve entrapment.

scholarly journals Is There a Relationship between the Elasticity of Brain Tumors, Changes in Diffusion Tensor Imaging, and Histological Findings? A Pilot Study Using Intraoperative Ultrasound Elastography

2021 ◽  
Vol 11 (2) ◽  
pp. 271
Author(s):  
Santiago Cepeda ◽  
Sergio García-García ◽  
María Velasco-Casares ◽  
Gabriel Fernández-Pérez ◽  
Tomás Zamora ◽  
...  
Keyword(s):  
Brain Tumor ◽  
Diffusion Tensor Imaging ◽  
Linear Regression ◽  
Brain Tumors ◽  
Diffusion Tensor ◽  
Intraoperative Ultrasound ◽  
Ultrasound Elastography ◽  
Proliferation Index ◽  
Strong Positive Correlation ◽  
Non Linear

Intraoperative ultrasound elastography (IOUS-E) is a novel image modality applied in brain tumor assessment. However, the potential links between elastographic findings and other histological and neuroimaging features are unknown. This study aims to find associations between brain tumor elasticity, diffusion tensor imaging (DTI) metrics, and cell proliferation. A retrospective study was conducted to analyze consecutively admitted patients who underwent craniotomy for supratentorial brain tumors between March 2018 and February 2020. Patients evaluated by IOUS-E and preoperative DTI were included. A semi-quantitative analysis was performed to calculate the mean tissue elasticity (MTE). Diffusion coefficients and the tumor proliferation index by Ki-67 were registered. Relationships between the continuous variables were determined using the Spearman ρ test. A predictive model was developed based on non-linear regression using the MTE as the dependent variable. Forty patients were evaluated. The pathologic diagnoses were as follows: 21 high-grade gliomas (HGG); 9 low-grade gliomas (LGG); and 10 meningiomas. Cases with a proliferation index of less than 10% had significantly higher medians of MTE (110.34 vs. 79.99, p < 0.001) and fractional anisotropy (FA) (0.24 vs. 0.19, p = 0.020). We found a strong positive correlation between MTE and FA (rs (38) = 0.91, p < 0.001). A cubic spline non-linear regression model was obtained to predict tumoral MTE from FA (R2 = 0.78, p < 0.001). According to our results, tumor elasticity is associated with histopathological and DTI-derived metrics. These findings support the usefulness of IOUS-E as a complementary tool in brain tumor surgery.

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