Morphological changes of the dorsal root ganglion in a patient with herpes zoster seen by magnetic resonance imaging

2008 ◽  
Vol 13 (4) ◽  
pp. 383-386 ◽  
Author(s):  
Mitsunori Yoshimoto ◽  
Satoshi Kawaguchi ◽  
Tsuneo Takebayashi ◽  
Satoshi Isogai ◽  
Shinsuke Nonaka ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Herpes Zoster ◽  
Magnetic Resonance ◽  
Dorsal Root Ganglion ◽  
Dorsal Root ◽  
Morphological Changes ◽  
Resonance Imaging

scholarly journals Magnetic resonance imaging (MRI) scans in patients with dorsal root ganglion stimulation

Pain Practice ◽  
2021 ◽  
Author(s):  
Marco Reining ◽  
Dirk Winkler ◽  
Joachim Boettcher ◽  
Juergen Meixensberger ◽  
Michael Kretzschmar
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Dorsal Root Ganglion ◽  
Dorsal Root ◽  
Resonance Imaging ◽  
Mri Scans ◽  
Magnetic Resonance Imaging Mri

scholarly journals EVALUATION OF THE LUMBAR SAFETY TRIANGLE THROUGH MAGNETIC RESONANCE IMAGING

2019 ◽  
Vol 18 (4) ◽  
pp. 276-279
Author(s):  
Fernando Augusto Dannebrock ◽  
Erasmo de Abreu Zardo ◽  
Marcus Sofia Ziegler ◽  
Carlos Marcelo Donazar Severo ◽  
Joel Abramczuk ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Dorsal Root Ganglion ◽  
Dorsal Root ◽  
Resonance Imaging ◽  
Safety Zone ◽  
Level Of Evidence ◽  
The Mean ◽  
Magnetic Resonance Imaging Mri ◽  
Lower Vertebra

ABSTRACT Objective: To evaluate the lumbar triangular safety zone, its boundaries and its relationship with the dorsal root ganglion through Magnetic Resonance Imaging (MRI). Methods: The boundaries, shape and dimensions of 303 triangular safety zones were analyzed in Tesla 3.0 Magnetic Resonance Imaging (MRI) coronal sections from L2 to L5, including the dorsal root ganglion. Results: The sample consisted of 101 patients with a mean age of 32 years. The height of the triangular safety zone was formed by the lateral edge of the dura mater, the width by the upper plateau of the lower vertebra and the hypotenuse by the corresponding nerve root. The mean dimensions and the area varied according to the level studied. The dorsal root ganglion invaded the dimensions of the triangle in all the images studied. Conclusion: Based on the data and the analyses performed, we concluded that knowledge of the boundaries of the triangular safety zone through MRI increases the safety of minimally invasive procedures in the lumbar spine. Level of evidence I; Diagnostic studies – Investigation of a diagnostic test.

scholarly journals Increased Wall Enhancement During Follow-Up as a Predictor of Subsequent Aneurysmal Growth

Stroke ◽  
2020 ◽  
Vol 51 (6) ◽  
pp. 1868-1872 ◽  
Author(s):  
Florent Gariel ◽  
Wagih Ben Hassen ◽  
Grégoire Boulouis ◽  
Romain Bourcier ◽  
Denis Trystram ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Predictive Value ◽  
Vessel Wall ◽  
De Novo ◽  
Morphological Changes ◽  
Multivariable Analysis ◽  
Resonance Imaging ◽  
Unruptured Intracranial Aneurysms

Background and Purpose— Absence of arterial wall enhancement (AWE) of unruptured intracranial aneurysms (UIA) has shown promise at predicting which aneurysms will not rupture. We here tested the hypothesis that increased enhancement during follow-up (increased intensity, extension, or thickness or appearance of de novo enhancement), assessed using vessel wall magnetic resonance imaging, was associated with higher rates of subsequent growth. Methods— Patients with UIA were included between 2012 and 2018. Two readers independently rated AWE modification on 3T vessel wall magnetic resonance imaging, and morphological changes on time-of-flight magnetic resonance angiography during follow-up. Results— A total of 129 patients harboring 145 UIA (mean size 4.1 mm) met study criteria, of which 12 (8.3%) displayed morphological growth at 2 years. Of them, 8 demonstrated increased AWE during follow-up before or concurrently to morphological growth, and 4 had preexisting AWE that remained stable before growth. In the remaining 133 (nongrowing) UIAs, no AWE modifications were found. In multivariable analysis, increased AWE, not size, was associated with UIA growth (relative risk, 26.1 [95% CI, 7.4–91.7], P <0.001). Sensitivity, specificity, positive predictive value, and negative predictive value for UIA growth of increased AWE during follow-up were, respectively, of 67%, 100%, 96%, and 100%. Conclusions— Increased AWE during follow-up of conservatively managed UIAs predicts aneurysm growth over a 2-year period. This may impact UIA management towards closer monitoring or preventive treatment. Replication in a different setting is warranted.

Progression of Experimental Infantile Hydrocephalus and Effects of Ventriculoperitoneal Shunts: An Analysis Correlating Magnetic Resonance Imaging with Gross Morphology

Neurosurgery ◽  
1991 ◽  
Vol 29 (3) ◽  
pp. 329-340 ◽  
Author(s):  
James P. McAllister ◽  
Mitchell I. Cohen ◽  
Kathleen A. O'Mara ◽  
Michele H. Johnson
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Morphological Changes ◽  
Internal Capsule ◽  
Dramatic Improvement ◽  
Ventricular Enlargement ◽  
Resonance Imaging ◽  
Infantile Hydrocephalus ◽  
Lateral Ventricles ◽  
Kaolin Injection

Abstract Although previous ultrasonographic studies did monitor ventricular enlargement successfully in experimentally-induced models of feline hydrocephalus, the resolution of neuroanatomic detail was relatively poor after placement of a ventriculoperitoneal (VP) shunt because the skull had ossified over the coronal sutures. Therefore, the present study employed magnetic resonance imaging to follow the progression of ventriculomegaly more accurately, as well as to evaluate the compensatory effects of VP shunting. Hydrocephalus was induced in kittens between 7 and 10 days old by injection of kaolin into the cisterna magna. Age-matched controls received similar injections of saline. At 9 to 14 days after the kaolin injection, the hydrocephalic animals received VP shunts. Anesthetized kittens were scanned at various intervals before and after shunt placement and were killed for morphological correlation. The features observed on the magnetic resonance imaging scans were consistent with the gross morphological changes that accompanied ventricular enlargement. The lateral ventricle began to enlarge as early as 1 day after the kaolin injection, and within 3 days, both the occipital and temporal horns, along with the 4th ventricle, showed signs of moderate dilatation. By 5 days, a bilateral communication had been established through the septum pellucidum. Continued expansion of the ventricular system occurred from 6 to 20 days after injection, to the point where the cerebral cortex was reduced to less than 25% of its original thickness. The internal capsule was stretched and edematous, the caudate nucleus was compressed ventrolaterally, and the cerebellar hemispheres were eroded and/or compressed. Animals in which shunts were successfully placed demonstrated a dramatic improvement in behavior, and a reduction of about 50% in the size of the lateral ventricles within 2 days. In some cases, the lateral ventricles became slit-like within 1 week. When they were killed, about half of the animals that received shunts exhibited mild to moderate ventriculomegaly. These results indicate that magnetic resonance imaging is an excellent method for visualizing the morphological changes associated with this animal model, that these alterations occur soon after the onset of hydrocephalus, and that VP shunting can successfully reduce ventriculomegaly.

Magnetic Resonance Imaging of Third Cranial Nerve Palsy and Trigeminal Sensory Loss Caused by Herpes Zoster

2006 ◽  
Vol 26 (1) ◽  
pp. 47-48 ◽  
Author(s):  
Susannah V Quisling ◽  
Vinay A Shah ◽  
Ho K Lee ◽  
Bruno Policeni ◽  
Wendy R. K Smoker ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Herpes Zoster ◽  
Magnetic Resonance ◽  
Cranial Nerve ◽  
Cranial Nerve Palsy ◽  
Nerve Palsy ◽  
Sensory Loss ◽  
Resonance Imaging ◽  
Third Cranial Nerve Palsy

Magnetic Resonance Imaging in a Patient With Herpes Zoster Keratouveitis and Contralateral Acute Retinal Necrosis

1991 ◽  
Vol 112 (6) ◽  
pp. 735-736 ◽  
Author(s):  
Thomas A. Farrell ◽  
Mitchell D. Wolf ◽  
James C. Folk ◽  
Jose S. Pulido ◽  
William T. Yuh
Keyword(s):  
Magnetic Resonance Imaging ◽  
Herpes Zoster ◽  
Magnetic Resonance ◽  
Acute Retinal Necrosis ◽  
Resonance Imaging

scholarly journals Plaque Distribution Correlates With Morphology of Lenticulostriate Arteries in Single Subcortical Infarctions

Stroke ◽  
2020 ◽  
Vol 51 (9) ◽  
pp. 2801-2809
Author(s):  
Shuai Jiang ◽  
Yuying Yan ◽  
Tang Yang ◽  
Qiange Zhu ◽  
Changyi Wang ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Vessel Wall ◽  
Morphological Changes ◽  
Control Group ◽  
Resonance Imaging ◽  
Whole Brain ◽  
Lenticulostriate Arteries ◽  
Symptomatic Side ◽  
Brain Vessel

Background and Purpose: We aimed to use novel whole-brain vessel-wall magnetic resonance imaging (WB-VWI) to investigate the association between plaque distribution of middle cerebral artery (MCA) and morphological changes of the lenticulostriate arteries (LSAs) in single subcortical infarctions. Methods: Forty single subcortical infarction patients with no relevant MCA disease on magnetic resonance angiography were prospectively enrolled. Plaque location in the MCA was dichotomized as proximal (located adjacent to the LSA origin) or distal (located distal to the LSA origin) on whole-brain vessel-wall magnetic resonance imaging. The MCAs with proximal plaques were divided into the symptomatic and asymptomatic side, and asymptomatic side MCAs without proximal plaques were the control group. The morphological characteristics of the LSAs and features of proximal plaques were analyzed. Results: A total of 71 MCAs in 40 patients were analyzed (31 on the symptomatic side, 22 on the asymptomatic side, and 18 in the control group). Superior-wall plaques of MCAs were observed more frequently on the symptomatic side than the asymptomatic side (45.2% versus 9.1%, P =0.005). The wall area index, plaque burden, and remodeling index did not differ significantly between the symptomatic and asymptomatic side. The number of LSA branches was smaller ( P =0.011) in the symptomatic side (5.48±1.88) compared with the control group (6.83±1.92). The symptomatic side exhibited shorter average length of the LSAs (23.23±3.44 versus 25.75±3.76 mm, P =0.025) and shorter average distance of the LSAs (16.47±3.11 versus 21.53±4.76 mm, P <0.001) compared with the asymptomatic side. Conclusions: Superiorly distributed MCA plaques at the LSA origin are closely associated with morphological changes of the LSA in symptomatic MCAs, suggesting that the distribution, rather than the inherent features of plaques, determines the occurrence of single subcortical infarctions. Our findings provide insight into the etiologic mechanism of branch atheromatous disease in single subcortical infarctions.

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