scholarly journals Cystic Meningioma Simulating Arachnoid Cyst: Report of an Unusual Case

2014 ◽  
Vol 2014 ◽  
pp. 1-4 ◽  
Author(s):  
Docampo Jorge ◽  
Gonzalez Nadia ◽  
Vazquez Claudio ◽  
Morales Carlos ◽  
Gonzalez-Toledo Eduardo
Keyword(s):  
Mr Imaging ◽  
Ct Scan ◽  
Arachnoid Cyst ◽  
Signal Intensity ◽  
Unusual Case ◽  
Mural Nodule ◽  
Vision Disorders ◽  
Diffusion Restriction ◽  
Cystic Meningioma ◽  
Fluid Signal

The purpose of this paper is to show an unusual case of meningioma simulating arachnoid cyst on CT scan and MRI, diagnosed in a 63-year-old woman evaluated for headache and vision disorders. The meningioma shown is predominantly cystic with a small mural nodule enhancing after gadolinium and exhibiting diffusion restriction. Cystic portion of the tumor is hypodense on CT, and evidences fluid signal intensity on T1- and T2-weighted MR imaging.

scholarly journals Erratum to “Cystic Meningioma Simulating Arachnoid Cyst: Report of an Unusual Case”

2014 ◽  
Vol 2014 ◽  
pp. 1-1
Author(s):  
Jorge Docampo ◽  
Nadia Gonzalez ◽  
Claudio Vazquez ◽  
Carlos Morales ◽  
Eduardo Gonzalez-Toledo
Keyword(s):  
Arachnoid Cyst ◽  
Unusual Case ◽  
Cystic Meningioma

A sacral arachnoid cyst causing holocord syringomyelia

2011 ◽  
Vol 8 (3) ◽  
pp. 299-302 ◽  
Author(s):  
Sumit Thakar ◽  
Narayanam Anantha Sai Kiran ◽  
Alangar S. Hegde
Keyword(s):  
Mr Imaging ◽  
Arachnoid Cyst ◽  
Complete Resolution ◽  
Spastic Paraparesis ◽  
Arachnoid Cysts ◽  
Sensory Loss ◽  
Low Back ◽  
Filum Terminale ◽  
Sensory Deficits

Spinal extradural arachnoid cysts (ACs) have an infrequent predilection for the sacrum. As with their counterparts in other regions of the spine, cysts in this location are mostly asymptomatic. Common presentations in symptomatic cases include pain in the low back or perineum, radiculopathy, and sphincteric dysfunction. The authors report a hitherto undescribed presentation in which the predominant symptoms are those related to an associated holocord syrinx. This 15-year-old boy presented with fluctuating, spastic paraparesis and a dissociated sensory loss in the trunk. Admission MR imaging of the spine showed an extradural AC from S-2 to S-4 and a holocord, nonenhancing syrinx. The patient underwent S-2 laminectomy, fenestration of the cyst, and partial excision of its wall. Intradural exploration revealed a normal-looking filum terminale and the absence of any dural communication with the cyst. At a follow-up visit 6 months after surgery, his motor and sensory deficits had resolved. Follow-up MR imaging showed complete resolution of the syrinx in the absence of the sacral AC. This is the first report of a sacral extradural AC causing holocord syringomyelia. Because conventional theories of syrinx formation were not helpful in elucidating this case, a hypothesis is postulated to explain the clinicoradiological oddity.

Preoperative single-slab 3D time-of-flight magnetic resonance angiography predicts development of new cerebral ischemic events after carotid endarterectomy

2009 ◽  
Vol 111 (1) ◽  
pp. 141-146 ◽  
Author(s):  
Taro Suzuki ◽  
Kuniaki Ogasawara ◽  
Ryonoshin Hirooka ◽  
Makoto Sasaki ◽  
Masakazu Kobayashi ◽  
...  
Keyword(s):  
At Risk ◽  
Mr Imaging ◽  
Carotid Endarterectomy ◽  
Signal Intensity ◽  
Mr Angiography ◽  
Time Of Flight ◽  
Neurological Deficits ◽  
Patients At Risk ◽  
Cerebral Ischemic ◽  
Ischemic Events

Object Preoperative impairment of cerebral hemodynamics predicts the development of new cerebral ischemic events after carotid endarterectomy (CEA), including neurological deficits and cerebral ischemic lesions on diffusion weighted MR imaging. Furthermore, the signal intensity of the middle cerebral artery (MCA) on single-slab 3D time-of-flight MR angiography (MRA) can assess hemodynamic impairment in the cerebral hemisphere. The purpose of the present study was to determine whether, on preoperative MR angiography, the signal intensity of the MCA can be used to identify patients at risk for development of cerebral ischemic events after CEA. Methods The signal intensity of the MCA ipsilateral to CEA on preoperative MR angiography was graded according to the ability to visualize the MCA in 106 patients with unilateral internal carotid artery stenosis (≥ 70%). Diffusion weighted MR imaging was performed within 3 days of and 24 hours after surgery. The presence or absence of new postoperative neurological deficits was also evaluated. Results Cerebral ischemic events after CEA were observed in 16 patients. Reduced signal intensity of the MCA on preoperative MR angiography was the only significant independent predictor of postoperative cerebral ischemic events. When the reduced MCA signal intensity on preoperative MR angiography was defined as an impairment in cerebral hemodynamics, MR angiography grading resulted in an 88% sensitivity and 63% specificity, with a 30% positive- and a 97% negative-predictive value for the development of postoperative cerebral ischemic events. Conclusions Signal intensity of the MCA on preoperative single-slab 3D time-of-flight MR angiography is useful for identifying patients at risk for cerebral ischemic events after CEA.

MR imaging of ventriculus terminalis of the conus medullaris: A report of two operated patients and review of the literature

2003 ◽  
Vol 44 (4) ◽  
pp. 444-446
Author(s):  
R. Dullerud ◽  
A. Server ◽  
J. Berg-Johnsen
Keyword(s):  
Spinal Cord ◽  
Mr Imaging ◽  
Signal Intensity ◽  
Incidental Finding ◽  
Conus Medullaris ◽  
Review Of The Literature ◽  
Per Se ◽  
Specific Symptoms ◽  
Work Up

We report on 2 patients in whom a cystic dilation of the conus medullaris was incidentally found at MR imaging carried out in the work-up for sciatica. The cysts were well circumscribed and had signal intensity identical to the CSF on both T1- and T2-weighted images. There was no evidence of contrast enhancement. None of the patients had specific symptoms related to the spinal cord. At surgery, no evidence of malignancy was seen in any of the patients. A benign cystic dilation, also called dilated ventriculus terminalis, occasionally can be seen in the conus medullaris as an incidental finding at thoracolumbar MR imaging. Unless the expansion per se indicates cyst drainage, these patients may be monitored by clinical and MR follow-up, avoiding surgery in a substantial number of cases.

MRI IN HYPOXIC ISCHEMIC ENCEPHALOPATHY WITH CLINICAL FOLLOW UP

2021 ◽  
pp. 43-48
Author(s):  
M R Shashikumar ◽  
Narasipur Lingaiah Rajendrakumar ◽  
Sanjay P ◽  
Nanjaraj Chakenalli Puttaraj ◽  
Shruti Shruti ◽  
...  
Keyword(s):  
Clinical Outcome ◽  
Mr Imaging ◽  
Developmental Disorders ◽  
Brain Mri ◽  
Birth Asphyxia ◽  
Hypoxic Ischemic Encephalopathy ◽  
Preterm Neonates ◽  
Diffusion Restriction ◽  
Ischemic Encephalopathy

Introduction: HIE is often clinically suspected in the setting of a known perinatal stress event arising from a complicated or difcult delivery. The most sensitive and specic imaging technique for examining infants with suspected hypoxicischemic brain injury is MR imaging. It also gives information about the timing and specic patterns of injury and also suggest diagnoses other than HIE such as metabolic disorders and developmental disorders of the brain. MRI is also a useful tool in the determination of prognosis and also follow-up of HIE. Aim: This study was undertaken to evaluate the various MRI appearances of hypoxic ischemic encephalopathy in term and preterm neonates and to correlate the MRI appearances with clinical outcome. Materials and Methods: All neonates with history of birth asphyxia, referred for MRI examination to the Department of Radio-Diagnosis, K. R. Hospital attached to Mysore Medical College and Research Institute, during January 2018 to January 2019. All MRI scans were performed on GE optima MR360 1.5 Tesla. Sequences used were T1W axial, T1 FLAIR axial, T2W axial, T2 FLAIR axial, T1W sag, T2W coronal, T2W GRE axial, DWI axial and ADC maps. Results: 30 babies with clinically suspicion of HIE and positive ndings on MR imaging were evaluated in our study. Out of 30 babies, 18 were term and 12 babies were preterm. Periventricular luecomalacia is most common MRI pattern in preterm and central pattern in term neonates. 16 babies had abnormal developmental outcome at 6 months follow up study. 16 babies with diffusion restriction in corpus callosum, 12 had abnormal outcome. 7 out of 10 babies with loss of normal signal in internal capsule had abnormal outcome. Babies with diffusion restriction in basal ganglia had gross developmental delay. Conclusion: MRI is the modality of choice for evaluation of HIE because of excellent gray – white matter resolution, well-depiction of myelination pattern and multi-planar imaging capabilities. There is a strong relation between the MRI appearances of birth asphyxia and the clinical outcome. Therefore MRI has a strong role in prognosticating lesions.

scholarly journals Uterine Artery Embolization for Symptomatic Fibroids with High Signal Intensity on T2-Weighted MR Imaging

2012 ◽  
Vol 13 (5) ◽  
pp. 618 ◽  
Author(s):  
Suyon Chang ◽  
Man-Deuk Kim ◽  
Myungsu Lee ◽  
Mu Sook Lee ◽  
Sung Il Park ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Signal Intensity ◽  
Uterine Artery Embolization ◽  
Uterine Artery ◽  
High Signal Intensity ◽  
High Signal ◽  
Artery Embolization

Appearances of diffuse excessive high signal intensity (DEHSI) on MR imaging following preterm birth

2010 ◽  
Vol 40 (8) ◽  
pp. 1390-1396 ◽  
Author(s):  
Anthony R. Hart ◽  
Michael F. Smith ◽  
Alan S. Rigby ◽  
Lauren I. Wallis ◽  
Elspeth H. Whitby
Keyword(s):  
Preterm Birth ◽  
Mr Imaging ◽  
Signal Intensity ◽  
High Signal Intensity ◽  
High Signal
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