Predictive Value of Ischemic Lesion Volume Assessed With Magnetic Resonance Imaging for Neurological Deficits and Functional Outcome Poststroke: A Critical Review of the Literature

2006 ◽  
Vol 20 (4) ◽  
pp. 492-502 ◽  
Author(s):  
S. K. Schiemanck ◽  
G. Kwakkel ◽  
M. W. M. Post ◽  
A. J. H. Prevo
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Functional Outcome ◽  
Critical Review ◽  
Predictive Value ◽  
Neurological Deficits ◽  
Lesion Volume ◽  
Review Of The Literature ◽  
Resonance Imaging ◽  
Ischemic Lesion

Epidermoid Tumors of Meckel's Cave: Case Report and Review of the Literature

Neurosurgery ◽  
1989 ◽  
Vol 25 (6) ◽  
pp. 951-955 ◽  
Author(s):  
Nobuhiko Miyazawa ◽  
Hiromichi Yamazaki ◽  
Tetsuo Wakao ◽  
Hideaki Nukui
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Neurological Deficits ◽  
Neurological Injury ◽  
Review Of The Literature ◽  
Resonance Imaging ◽  
Meckel’S Cave ◽  
Weighted Image ◽  
Meckel's Cave ◽  
Sensory Evoked

Abstract Lesions of Meckel's cave are extremely uncommon and difficult to diagnose. The symptoms and signs are variable, and the lesion may not appear on routine roentgenographic or computed tomographic examination. A patient with a small epidermoid tumor of Meckel's cave that was diagnosed by magnetic resonance imaging is herein reported. The epidermoid appeared as a low-intensity mass on the T1-weighted image and as a high-intensity mass on the T2-weighted image. Coronal sections defined the anatomic relationship to the trigeminal nerve. Preoperative recordings of the trigeminal sensory evoked response may be predictive of postoperative recovery of neurological deficits. Furthermore, intraoperative recording was extremely useful in avoiding inadvertent neurological injury. Review of the literature confirms the rarity of this lesion and the usefulness of magnetic resonance imaging in diagnosing it, although based on a limited number of cases.

Technical and radiographic considerations for magnetic resonance imaging–guided focused ultrasound capsulotomy

2020 ◽  
pp. 1-9 ◽  
Author(s):  
Benjamin Davidson ◽  
Karim Mithani ◽  
Yuexi Huang ◽  
Ryan M. Jones ◽  
Maged Goubran ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Focused Ultrasound ◽  
Neurosurgical Procedures ◽  
Lesion Volume ◽  
Angle Of Incidence ◽  
Resonance Imaging ◽  
Radiographic Findings ◽  
Compulsive Disorder ◽  
Skull Thickness

OBJECTIVEMagnetic resonance imaging–guided focused ultrasound (MRgFUS) is an emerging treatment modality that enables incisionless ablative neurosurgical procedures. Bilateral MRgFUS capsulotomy has recently been demonstrated to be safe and effective in treating obsessive-compulsive disorder (OCD) and major depressive disorder (MDD). Preliminary evidence has suggested that bilateral MRgFUS capsulotomy can present increased difficulties in reaching lesional temperatures as compared to unilateral thalamotomy. The authors of this article aimed to study the parameters associated with successful MRgFUS capsulotomy lesioning and to present longitudinal radiographic findings following MRgFUS capsulotomy.METHODSUsing data from 22 attempted MRgFUS capsulotomy treatments, the authors investigated the relationship between various sonication parameters and the maximal temperature achieved at the intracranial target. Lesion volume and morphology were analyzed longitudinally using structural and diffusion tensor imaging. A retreatment procedure was attempted in one patient, and their postoperative imaging is presented.RESULTSSkull density ratio (SDR), skull thickness, and angle of incidence were significantly correlated with the maximal temperature achieved. MRgFUS capsulotomy lesions appeared similar to those following MRgFUS thalamotomy, with three concentric zones observed on MRI. Lesion volumes regressed substantially over time following MRgFUS. Fractional anisotropy analysis revealed a disruption in white matter integrity, followed by a gradual return to near-baseline levels concurrent with lesion regression. In the patient who underwent retreatment, successful bilateral lesioning was achieved, and there were no adverse clinical or radiographic events.CONCLUSIONSWith the current iteration of MRgFUS technology, skull-related parameters such as SDR, skull thickness, and angle of incidence should be considered when selecting patients suitable for MRgFUS capsulotomy. Lesions appear to follow morphological patterns similar to what is seen following MRgFUS thalamotomy. Retreatment appears to be safe, although additional cases will be necessary to further evaluate the associated safety profile.

scholarly journals A243 A RETROSPECTIVE REVIEW OF THE RADIOGRAPHIC DIAGNOSIS AND SURGICAL RESECTION RATES OF PANCREATIC SEROUS CYSTS

2021 ◽  
Vol 4 (Supplement_1) ◽  
pp. 300-301
Author(s):  
M Monachese ◽  
S Li ◽  
M Salim ◽  
L Guimaraes ◽  
P D James
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Surgical Resection ◽  
Predictive Value ◽  
Resected Specimen ◽  
Cystic Lesions ◽  
Resonance Imaging ◽  
Guided Biopsy ◽  
Magnetic Resonance Imaging Mri

Abstract Background Pancreatic cystic lesions are increasingly identified in persons undergoing abdominal imaging. Serous cystic neoplasms (SCNs) have a very low risk of malignant transformation. Resection of SCNs is not recommended in the absence of related symptoms. The accuracy of computed tomography (CT) and magnetic resonance imaging (MRI) to identify SCNs is not known and may impact clinical care. Aims To evaluate the accuracy of computed tomography (CT) and magnetic resonance imaging (MRI) for the diagnosis of SCN. To see how this can impact the decision to resect suspected SCNs. Methods Retrospective cohort study of patients from the University Health Network with suspected SCNs from 2017–2020 who underwent either a CT or MRI of the abdomen. Reports noting pancreatic cystic lesions were identified and reviewed. Only cases with suspected SCNs were included. Clinical (age, sex, symptoms, treatment) and radiographic (type of imaging, reported cyst characteristics) data was collected. Pathology was reviewed for all cases where the cysts was biopsied or resected during follow-up. The gold standard for the diagnosis for SCN was pathology of resected specimen or EUS-guided biopsy cytopathology showing no evidence of a mucinous lesion, CEA level below 10ug per L and amylase level below 50 U/L. Results 163 patients were included in the study. 99 (61%) were female and 98 (60%) underwent CT scan. EUS-guided biopsy was performed in 24 (15%) of patients and 8 (5%) had surgical resection. Multidisciplinary review was performed in 6 of the 8 cases that went to surgery. Of the resected specimens, 5 (63%) were SCN, 1 was a mucinous cystic lesion, 1 was a neuroendocrine tumor and 1 was a carcinoma. Two patients underwent EUS evaluation prior to surgical resection. In one case SCN was resected when EUS reported an undetermined cyst type. Reasons for surgical resection were: the diagnosis of serous cyst was not definitive (n=5), symptoms (n=2), and high-risk mucinous cystic neoplasm identified on EUS (n=1). Of 30 patients with pathology available, 15 (50%) were confirmed to have a SCN. CT and MRI had a sensitivity, specificity, positive predictive value and negative predictive value of 93%, 25%, 52% and 80%, respectively. Conclusions Surgical resection for SCN lesions is driven by diagnostic uncertainty after cross-sectional imaging. Multidisciplinary review and EUS evaluation may improve diagnostic accuracy and should be considered prior to surgical resection of possible SCN lesions. Funding Agencies None

Norovirus Causes Pediatric Encephalopathy and Status Epilepticus: A Case Report and Review of the Literature

2021 ◽  
Author(s):  
Gabriela Tantillo ◽  
Navyamani Kagita ◽  
Maite LaVega-Talbott ◽  
Anuradha Singh ◽  
David Kaufman
Keyword(s):  
Magnetic Resonance Imaging ◽  
Case Report ◽  
Status Epilepticus ◽  
Magnetic Resonance ◽  
Review Of The Literature ◽  
Resonance Imaging ◽  
Common Cause ◽  
Diffusion Restriction ◽  
Neurologic Impairment ◽  
Norovirus Gastroenteritis

AbstractNorovirus is a common cause of acute gastroenteritis outbreaks worldwide. The disease can present with varying degrees of neurologic impairment from benign convulsions to rare cases of severe encephalopathy. We describe a case report of a North American infant who presented with norovirus gastroenteritis, status epilepticus, severe encephalopathy, and abnormal but reversible diffusion restriction changes on magnetic resonance imaging of brain.

scholarly journals Ventriculus Terminalis in Adults: Unusual Magnetic Resonance Imaging Features and Review of the Literature

2012 ◽  
Vol 13 (5) ◽  
pp. 557 ◽  
Author(s):  
Sang Hyun Suh ◽  
Tae-Sub Chung ◽  
Seung-Koo Lee ◽  
Yong-Eun Cho ◽  
Keun Su Kim
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Imaging Features ◽  
Review Of The Literature ◽  
Resonance Imaging
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