The Experts below are selected from a list of 11439 Experts worldwide ranked by ideXlab platform
B P Brophy - One of the best experts on this subject based on the ideXlab platform.
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an unusual spinal intradural Arachnoid Cyst
Neuroradiology, 1996Co-Authors: J P Slavotinek, Michael R Sage, B P BrophyAbstract:Spinal intradural Arachnoid Cysts are seen most frequently in the thoracic region, particularly near the midline posteriorly. A thoracic intradural Arachnoid Cyst in this typical location is reported, with the additional unusual finding of herniation of the spinal cord through an anterior defect in the dura mater. The MRI findings are described.
Marion L Walker - One of the best experts on this subject based on the ideXlab platform.
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noncommunicating spinal extradural Arachnoid Cyst causing spinal cord compression in a child
Journal of Neurosurgery, 2005Co-Authors: James K Liu, John R W Kestle, Chad D Cole, Gregory T Sherr, Marion L WalkerAbstract:Extradural Arachnoid Cysts in the spine are relatively uncommon causes of spinal cord compression in the pediatric population that are thought to arise from congenital defects in the dura mater. Most reports describe such Cysts communicating with the intrathecal subArachnoid space through a small defect in the dura. The authors describe the case of a child who presented with spinal cord compression caused by a large spinal extradural Arachnoid Cyst that did not communicate with the intradural subArachnoid space. An 11-year-old girl presented with urinary urgency, progressive lower-extremity weakness, myelopathy, and severe gait ataxia. Magnetic resonance imaging of the spine demonstrated a large extradural Arachnoid Cyst extending from T-8 to T-12. The patient underwent a thoracic laminoplasty for en bloc resection of the spinal extradural Arachnoid Cyst. Intraoperatively, the dura was intact and there was no evidence of communication into the intradural subArachnoid space. Postoperatively, the patient's motor strength and ambulation improved immediately, and no subsequent cerebrospinal fluid leak occurred. Noncommunicating spinal extradural Arachnoid Cysts are extremely rare lesions that can cause spinal cord compression in children. Because the dura remains intact, they can be removed entirely without subsequent dural repair. The authors review the literature and discuss the proposed underlying mechanisms of formation of these Arachnoid Cysts.
John R W Kestle - One of the best experts on this subject based on the ideXlab platform.
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risk factors for pediatric Arachnoid Cyst rupture hemorrhage a case control study
Neurosurgery, 2013Co-Authors: Marshall C Cress, John R W Kestle, Richard Holubkov, Jay RivacambrinAbstract:BACKGROUND As the availability of imaging modalities has increased, the finding of Arachnoid Cysts has become common. Accurate patient counseling regarding physical activity or risk factors for Cyst rupture or hemorrhage has been hampered by the lack of definitive association studies. OBJECTIVE This case-control study evaluated factors that are associated with Arachnoid Cyst rupture (intraCystic hemorrhage, adjacent subdural hematoma, or adjacent subdural hygroma) in pediatric patients with previously asymptomatic Arachnoid Cysts. METHODS Patients with Arachnoid Cysts and intraCystic hemorrhage, adjacent subdural hygroma, or adjacent subdural hematoma treated at a single institution from 2005 to 2010 were retrospectively identified. Two unruptured/nonhemorrhagic controls were matched to each case based on patient age, sex, anatomical Cyst location, and side. Risk factors evaluated included Arachnoid Cyst size, recent history of head trauma, and altitude at residence. RESULTS The proportion of imaged Arachnoid Cysts that presented either originally or subsequently with a rupture or hemorrhage was 6.0%. Larger Cyst size, as defined by maximal Cyst diameter, was significantly associated with Cyst rupture/hemorrhage (P < .001). When dichotomized with a 5-cm cutoff, 9/13 larger Cysts ruptured and/or hemorrhaged, whereas only 5/29 smaller Cysts ruptured/hemorrhaged (odds ratio = 16.5 (confidence interval [2.5, ∞]). A recent history of head trauma was also significantly associated with the outcome (P < .001; odds ratio = 25.1 (confidence interval [4.0, ∞]). Altitude was not associated with Arachnoid Cyst rupture or hemorrhage. CONCLUSION This case-control study suggests that larger Arachnoid Cyst size and recent head trauma are risk factors for symptomatic Arachnoid Cyst rupture/hemorrhage.
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noncommunicating spinal extradural Arachnoid Cyst causing spinal cord compression in a child
Journal of Neurosurgery, 2005Co-Authors: James K Liu, John R W Kestle, Chad D Cole, Gregory T Sherr, Marion L WalkerAbstract:Extradural Arachnoid Cysts in the spine are relatively uncommon causes of spinal cord compression in the pediatric population that are thought to arise from congenital defects in the dura mater. Most reports describe such Cysts communicating with the intrathecal subArachnoid space through a small defect in the dura. The authors describe the case of a child who presented with spinal cord compression caused by a large spinal extradural Arachnoid Cyst that did not communicate with the intradural subArachnoid space. An 11-year-old girl presented with urinary urgency, progressive lower-extremity weakness, myelopathy, and severe gait ataxia. Magnetic resonance imaging of the spine demonstrated a large extradural Arachnoid Cyst extending from T-8 to T-12. The patient underwent a thoracic laminoplasty for en bloc resection of the spinal extradural Arachnoid Cyst. Intraoperatively, the dura was intact and there was no evidence of communication into the intradural subArachnoid space. Postoperatively, the patient's motor strength and ambulation improved immediately, and no subsequent cerebrospinal fluid leak occurred. Noncommunicating spinal extradural Arachnoid Cysts are extremely rare lesions that can cause spinal cord compression in children. Because the dura remains intact, they can be removed entirely without subsequent dural repair. The authors review the literature and discuss the proposed underlying mechanisms of formation of these Arachnoid Cysts.
Harel Deutsch - One of the best experts on this subject based on the ideXlab platform.
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Thoracic Arachnoid Cyst resection.
Neurosurgical Focus, 2014Co-Authors: Harel DeutschAbstract:Arachnoid Cysts in the spinal cord may be asymptomatic. In some cases Arachnoid Cysts may exert mass effect on the thoracic spinal cord and lead to pain and myelopathy symptoms. Arachnoid Cysts may be difficult to visualize on an MRI scan because the thin walled Arachnoid may not be visible. Focal displacement of the thoracic spinal cord and effacement of the spinal cord with apparent widening of the cerebrospinal fluid space is seen. This video demonstrates surgical techniques to remove a dorsal Arachnoid Cyst causing spinal cord compression. The surgery involves a thoracic laminectomy. The dura is opened sharply with care taken not to open the Arachnoid so that the Cyst can be well visualized. The thickened Arachnoid walls of the Cyst are removed to alleviate the compression caused by the Arachnoid Cyst. The video can be found here: http://youtu.be/pgUrl9xvsD0.
J P Slavotinek - One of the best experts on this subject based on the ideXlab platform.
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an unusual spinal intradural Arachnoid Cyst
Neuroradiology, 1996Co-Authors: J P Slavotinek, Michael R Sage, B P BrophyAbstract:Spinal intradural Arachnoid Cysts are seen most frequently in the thoracic region, particularly near the midline posteriorly. A thoracic intradural Arachnoid Cyst in this typical location is reported, with the additional unusual finding of herniation of the spinal cord through an anterior defect in the dura mater. The MRI findings are described.