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MR neurography

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https://www.readbyqxmd.com/read/27906945/ganglion-cyst-at-the-proximal-tibiofibular-joint-in-a-patient-with-painless-foot-drop
#1
Abdulmuhsen Alsahhaf, Waleed Renno
Entrapment neuropathies of the fibular nerve and its branches are often underdiagnosed due to the lack of reliable diagnosis using clinical examination and electrophysiologic evaluation. Most fibular nerve compressions may be classified into 2 broad categories: (a) mechanical causes, which occur at fibrous or fibro-osseous tunnels, and (b) dynamic causes related to nerve injury during specific limb positioning. Foot drop resulting from weakness of the dorsiflexor muscles of the foot is a relatively uncommon presentation and closely related to L5 neuropathy caused by a disc herniation...
November 2016: Pain Physician
https://www.readbyqxmd.com/read/27862251/anatomic-variability-of-the-lateral-femoral-cutaneous-nerve-value-of-3t-mri-in-identifying-anomaly-for-surgical-intervention
#2
Jan Fritz, Denniz Zolnoun, A Lee Dellon
The anatomic variability of the lateral femoral cutaneous nerve (LFC) creates diagnostic as well as therapeutic problems. A case is reported in which a woman with complaints of pain in the anterior and lateral thigh was referred for evaluation. Symptoms arose after an abdominal hysterectomy. Her symptoms were the territory of the LFC and not of the L2/L3 dermatome. She had a Tinel sign that was positive for the LFC skin territory, but this was located over the anterior superior iliac spine (ASIS), instead of medial to it...
November 11, 2016: Microsurgery
https://www.readbyqxmd.com/read/27857458/magnetic-resonance-neurographic-confirmation-of-extensive-plexiform-neurofibroma-in-neurofibromatosis-1-presenting-as-ambiguous-genitalia
#3
Ishan Kumar, Ashish Verma, Ritu Ojha, Priyanka Aggarwal, Ram C Shukla, Arvind Srivastava
Genitourinary involvement of neurofibromatosis is uncommon and genital neurofibromatosis is even rarer. Involvement of clitoris by neurofibroma can lead to clitoromegaly masquerading as a male penis. We report such a case of ambiguous genitalia in a 7-year-old female child presenting with clitoromegaly since birth, in which magnetic resonance imaging (MRI) revealed the presence of extensive neurofibromatosis in the clitoris and lumbosacral regions. We emphasize the central role of MRI in evaluation of hormonal and non-hormonal causes of ambiguous genitalia...
July 2016: Indian Journal of Radiology & Imaging
https://www.readbyqxmd.com/read/27828983/sacrotuberous-ligament-healing-following-surgical-division-during-transgluteal-pudendal-nerve-decompression-a-3-tesla-mr-neurography-study
#4
Jan Fritz, Benjamin Fritz, A Lee Dellon
Pelvic pain due to chronic pudendal nerve (PN) compression, when treated surgically, is approached with a transgluteal division of the sacrotuberous ligament (STL). Controversy exists as to whether the STL heals spontaneously or requires grafting. Therefore, the aim of this study was to determine how surgically divided and unrepaired STL heal. A retrospective evaluation of 10 patients who had high spatial resolution 3-Tesla magnetic resonance imaging (3T MRI) exams of the pelvis was done using an IRB-approved protocol...
2016: PloS One
https://www.readbyqxmd.com/read/27801698/magnetic-resonance-neurographic-and-clinical-long-term-results-after-oberlin-s-transfer-for-adult-brachial-plexus-injuries
#5
Florian S Frueh, Michael Ho, Andreas Schiller, Pascal Ducommun, Andrei Manoliu, Gustav Andreisek, Maurizio Calcagni, Pietro Giovanoli
The primary goal of the surgical treatment of upper brachial plexus injuries is to restore active elbow flexion. Accordingly, Oberlin's transfer has been frequently performed since 1994 and has influenced the development of other nerve transfers. However, the window of opportunity for nerve transfers remains a subject of controversy. The objective of this study was to assess magnetic resonance (MR) neurographic, clinical and electrophysiological long-term results after Oberlin's transfer. For this purpose, we performed a retrospective follow-up study...
October 31, 2016: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/27782162/diagnostic-value-and-surgical-implications-of-the-3d-dw-ssfp-mri-on-the-management-of-patients-with-brachial-plexus-injuries
#6
Ben-Gang Qin, Jian-Tao Yang, Yi Yang, Hong-Gang Wang, Guo Fu, Li-Qiang Gu, Ping Li, Qing-Tang Zhu, Xiao-Lin Liu, Jia-Kai Zhu
Three-dimensional diffusion-weighted steady-state free precession (3D DW-SSFP) of high-resolution magnetic resonance has emerged as a promising method to visualize the peripheral nerves. In this study, the application value of 3D DW-SSFP brachial plexus imaging in the diagnosis of brachial plexus injury (BPI) was investigated. 33 patients with BPI were prospectively examined using 3D DW-SSFP MR neurography (MRN) of brachial plexus. Results of 3D DW-SSFP MRN were compared with intraoperative findings and measurements of electromyogram (EMG) or somatosensory evoked potentials (SEP) for each injured nerve root...
October 26, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27721757/a-case-of-suspected-breast-cancer-metastasis-to-brachial-plexus-detected-by-magnetic-resonance-neurography
#7
Atsushi Mizuma, Chikage Kijima, Eiichiro Nagata, Shunya Takizawa
Metastasis of breast cancer is often detected through a long-term course and difficult to diagnose. We report a case of brachial plexopathy suspected to be the initial lesion of breast cancer metastasis, which was only detected by magnetic resonance (MR) neurography. A 61-year-old woman was admitted to our hospital within 2 years after operation for breast cancer because of progressive dysesthesia and motor weakness initially in the upper limb on the affected side and subsequently on the contralateral side...
May 2016: Case Reports in Oncology
https://www.readbyqxmd.com/read/27666420/evaluation-of-the-sacral-nerve-plexus-in-pelvic-endometriosis-by-three-dimensional-mr-neurography
#8
Xiaoling Zhang, Meizhi Li, Jian Guan, Huanjun Wang, Shurong Li, Yan Guo, Mingjuan Liu
PURPOSE: To investigate the feasibility of three-dimensional MR neurography (3D MRN) for the sacral plexus using sampling perfection with application-optimized contrasts using different flip angle evolution (SPACE) sequences, and to demonstrate structural abnormalities in the pelvic nerve of women with pelvic endometriosis. MATERIALS AND METHODS: Twenty patients with pelvic endometriosis and 20 healthy controls were examined by contrast-enhanced 3D short time inversion recovery T2-weighted imaging (CE 3D STIR T2WI) SPACE sequences on 3 Tesla MRI...
September 26, 2016: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/27631109/diffusion-weighted-mr-neurography-of-median-and-ulnar-nerves-in-the-wrist-and-palm
#9
Hongjing Bao, Shanshan Wang, Guangbin Wang, Li Yang, Mansoor-Ul Hasan, Bin Yao, Chao Wu, Xu Zhang, Weibo Chen, Queenie Chan, Lebin Wu, Avneesh Chhabra
OBJECTIVES: To investigate the feasibility of diffusion-weighted magnetic resonance neurography (DW-MRN) in the visualisation of extremity nerves in the wrist and palm. METHODS: Thirty-two volunteers and 21 patients underwent imaging of the wrist and palm on a 3-T MR scanner. In all subjects, two radiologists evaluated the image quality on DW-MRN using a four-point grading scale. Kappa statistics were obtained for inter-observer performance. In volunteers, the chi-squared test was used to assess the differences in nerve visualisation on DW-MRN and axial fat-suppressed proton density weighted imaging (FS-PDWI)...
September 15, 2016: European Radiology
https://www.readbyqxmd.com/read/27558928/clinical-impact-of-magnetic-resonance-neurography-in-patients-with-brachial-plexus-neuropathies
#10
Stephen Fisher, Vibhor Wadhwa, Christine Manthuruthil, Jonathan Cheng, Avneesh Chhabra
OBJECTIVES: To study the impact of brachial plexus magnetic resonance neurography (MRN) in diagnostic thinking and therapeutic management of patients with suspected plexopathy. METHODS: MRN examinations of adult brachial plexuses over a period of 18 months were reviewed. Relevant data collection included - patient demographics, clinical history, pre-imaging diagnostic impression, pre-imaging treatment plan, post-imaging diagnosis, post-imaging treatment plan, surgical notes, and electrodiagnostic (ED) results...
August 25, 2016: British Journal of Radiology
https://www.readbyqxmd.com/read/27551340/3t-magnetic-resonance-neurography-of-pudendal-nerve-with-cadaveric-dissection-correlation
#11
Avneesh Chhabra, Courtney A McKenna, Vibhor Wadhwa, Gaurav K Thawait, John A Carrino, Gary P Lees, A Lee Dellon
AIM: To evaluate the pudendal nerve segments that could be identified on magnetic resonance neurography (MRN) before and after surgical marking of different nerve segments. METHODS: The hypothesis for this study was that pudendal nerve and its branches would be more easily seen after the surgical nerve marking. Institutional board approval was obtained. One male and one female cadaver pelvis were obtained from the anatomy board and were scanned using 3 Tesla MRI scanner using MR neurography sequences...
July 28, 2016: World Journal of Radiology
https://www.readbyqxmd.com/read/27530499/two-cases-of-chronic-immune-sensorimotor-polyradiculopathy-expanding-the-spectrum-of-chronic-immune-polyradiculopathies
#12
Satish Khadilkar, Bhagyadhan Patel, Khushnuma A Mansukhani, Sunila Jaggi
INTRODUCTION: Immune-mediated demyelinating radiculopathies restricted to proximal sensory or motor roots are uncommon. METHODS: We report the clinical, electrophysiological, biochemical, and radiological features in 2 patients with chronic immune sensorimotor polyradiculopathy (CISMP). RESULTS: The patients presented with sensory ataxia, weakness of the lower limbs, and areflexia. Electrophysiological studies revealed involvement of proximal sensorimotor roots, as evidenced by changes in somatosensory evoked potentials, F-waves, and H-reflexes...
August 17, 2016: Muscle & Nerve
https://www.readbyqxmd.com/read/27500391/magnetic-resonance-neurography-for-the-evaluation-of-cidp
#13
Tomomasa Ishikawa, Kunihiko Asakura, Yasuaki Mizutani, Akihiro Ueda, Ken-Ichiro Murate, Chika Hikichi, Sayuri Shima, Madoka Kizawa, Masako Komori, Kazuhiro Murayama, Hiroshi Toyama, Shinji Ito, Tatsuro Mutoh
INTRODUCTION: To visualize peripheral nerves in patients with chronic inflammatory demyelinating polyneuropathy (CIDP), we used magnetic resonance (MR) imaging. We also quantified the volumes of the brachial and lumbar plexus and their nerve roots. METHODS: Thirteen patients with CIDP and 12 healthy volunteers were enrolled. Whole-body MR neurography based on diffusion-weighted whole-body imaging with background body signal suppression (DWIBS) was performed. Peripheral nerve volumes were calculated from serial axial MR images...
August 8, 2016: Muscle & Nerve
https://www.readbyqxmd.com/read/27472827/diffusion-tensor-imaging-mr-neurography-for-the-detection-of-polyneuropathy-in-type-1-diabetes
#14
Michael Vaeggemose, Mirko Pham, Steffen Ringgaard, Hatice Tankisi, Niels Ejskjaer, Sabine Heiland, Per L Poulsen, Henning Andersen
PURPOSE: To evaluate if diffusion tensor imaging MR neurography (DTI-MRN) can detect lesions of peripheral nerves in patients with type 1 diabetes. MATERIALS AND METHODS: Eleven type 1 diabetic patients with polyneuropathy (DPN), 10 type 1 diabetic patients without polyneuropathy (nDPN), and 10 healthy controls (HC) were investigated with a 3T MRI scanner. Clinical examinations, nerve-conduction studies, and vibratory-perception thresholds determined the presence of DPN...
July 29, 2016: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/27402939/mr-neurography-of-a-vagal-neuropathy
#15
Elisa Ventura, Concetta Manno, Claudio Gobbi, Valerio A Vitale, Alessandro Cianfoni
No abstract text is available yet for this article.
July 12, 2016: Neurology
https://www.readbyqxmd.com/read/27390317/3d-mr-neurography-of-the-lumbosacral-plexus-obtaining-optimal-images-for-selective-longitudinal-nerve-depiction
#16
G Cho Sims, E Boothe, R Joodi, A Chhabra
BACKGROUND AND PURPOSE: The number of centers currently performing 3D fat-suppressed isotropic imaging is limited. If the angular orientations of the major lumbosacral plexus nerves on 3D isotropic MR neurography could be determined, similar planes could be prescribed during acquisition of 2D or 3D nonisotropic techniques for optimal depiction of various nerves. Our aim was to determine oblique sagittal and coronal angular measurements for longitudinal depiction of lumbosacral plexus nerves...
July 7, 2016: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/27126998/whole-body-mr-neurography-prospective-feasibility-study-in-polyneuropathy-and-charcot-marie-tooth-disease
#17
Avneesh Chhabra, John A Carrino, Sahar J Farahani, Gaurav K Thawait, Charlotte J Sumner, Vibhor Wadhwa, Vinay Chaudhary, Thomas E Lloyd
PURPOSE: To evaluate the feasibility of whole-body magnetic resonance neurography (WBMRN) in polyneuropathy for technical feasibility, distribution of nerve abnormalities, and differentiation. MATERIALS AND METHODS: Twenty WBMRN examinations were performed on a 3T scanner over 2 years. Patient demographics including history of hereditary and acquired neuropathy were recorded. The images were evaluated by two independent readers with nerve imaging experience for quality...
December 2016: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/27001989/nerve-ultrasound-and-3d-mr-neurography-suggestive-of-intraneural-perineurioma
#18
Alessandro Salvalaggio, Mario Cacciavillani, Daniele Coraci, Carmen Erra, Roberto Gasparotti, Stefano Ferraresi, Luca Padua, Chiara Briani
No abstract text is available yet for this article.
March 22, 2016: Neurology
https://www.readbyqxmd.com/read/26860670/the-application-of-paramagnetic-contrast-based-t2-effect-to-3d-heavily-t2w-high-resolution-mr-imaging-of-the-brachial-plexus-and-its-branches
#19
Lixia Wang, Yanfeng Niu, Xiangquan Kong, Qun Yu, Xiangchuang Kong, Yinzhang Lv, Heshui Shi, Chungao Li, Wenjun Wu, Bing Wang, Dingxi Liu
OBJECTIVE: To introduce a new 3D magnetic resonance neurography (MRN) method involving a paramagnetic contrast-based T2 effect coupled with an advanced 3D heavily T2W SPACE-STIR high resolution imaging sequence that would enhance the contrast between nervous tissue and surrounding tissues. METHODS: Thirty subjects (average age, 39.6±17.0 years; 18 male and 12 female) were enrolled, including three patients with brachial plexopathy and 27 healthy volunteers. Subjective scores from two neuroradiologists, evaluating noncontrast MRN (cMRN) and 3D SPACE-STIR contrast enhanced MRN (ceMRN) 3D data using a 3-point scoring system, were compared using Wilcoxon signed-rank test...
March 2016: European Journal of Radiology
https://www.readbyqxmd.com/read/26854879/mr-neurographic-orthopantomogram-ultrashort-echo-time-imaging-of-mandibular-bone-and-teeth-complemented-with-high-resolution-morphological-and-functional-mr-neurography
#20
Andrei Manoliu, Michael Ho, Daniel Nanz, Evelyn Dappa, Andreas Boss, David M Grodzki, Wei Liu, Avneesh Chhabra, Gustav Andreisek, Felix P Kuhn
PURPOSE: Panoramical radiographs or cone-beam computed tomography (CT) are the standard-of-care in dental imaging to assess teeth, mandible, and mandibular canal pathologies, but do not allow assessment of the inferior alveolar nerve itself nor of its branches. We propose a new technique for "MR neurographic orthopantomograms" exploiting ultrashort echo-time (UTE) imaging of bone and teeth complemented with high-resolution morphological and functional MR neurography. MATERIALS AND METHODS: The Institutional Review Board approved the study in 10 healthy volunteers...
August 2016: Journal of Magnetic Resonance Imaging: JMRI
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