The Experts below are selected from a list of 1260 Experts worldwide ranked by ideXlab platform
Marios Loukas - One of the best experts on this subject based on the ideXlab platform.
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human Spinal Arachnoid villi revisited immunohistological study and review of the literature
Journal of Neurosurgery, 2007Co-Authors: Shane R Tubbs, Ake Hansasuta, William R Stetler, David R Kelly, Danitra Blevins, Rita Humphrey, Gina D Chua, Mohammadali Mohajel Shoja, Marios LoukasAbstract:Object Few have described the relationship between Arachnoid protrusions (villi) and adjacent Spinal radicular veins, and the descriptions that do exist are conflicting. Some authors have even denied the presence of Spinal Arachnoid villi, suggesting that they play no role in cerebroSpinal fluid (CSF) absorption. Methods To further elucidate these structures, laminectomies from C-2 inferiorly to S-2 were performed in 10 fresh human adult cadavers. Following removal of the laminae, the dural nerve sleeves were identified and the Spinal nerves excised 1 cm lateral and medial to the intervertebral foramina. Samples were submitted for histological and immunohistological analysis. Results The authors identified Arachnoid villi in all specimens. The length of these structures was approximately 50 to 170 μm. Regionally, these villi were more concentrated in the lumbar region, but they were not present at every vertebral level, with observed skip zones. Occasionally, more than one villus was identified per verteb...
Chienmin Chen - One of the best experts on this subject based on the ideXlab platform.
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utilizing real time contrast medium to detect the fistula of giant Spinal Arachnoid cyst and treat with minimal invasive surgery
BMC Surgery, 2019Co-Authors: Guangyu Ying, Kaisheng Chang, Yajuan Tang, Chunyuan Cheng, Yongjian Zhu, Chienmin ChenAbstract:Spinal Arachnoid cysts are rare and have varied clinical manifestations depending on the affected Spinal region and nerve roots. A complete cyst excision with fistula closure is the first choice of treatment. However, it might be difficult to localize the specific position of the fistula because previous images have no enhancements or the fistula is too tiny to be detected. This case is a giant lumbar extradural Arachnoid cyst. We administered a lumbar injection with contrast medium into subArachnoid space under digital subtraction angiography (DSA) and disclosed the fistula. Confirming the location of fistula enabled us to perform minimally invasive surgery to ligate the fistula. Surgical intervention for a Spinal Arachnoid cyst might encounter the problem of the formation of a postoperative cerebroSpinal fluid (CSF) fistula. We propose the option of detecting the fistula preoperatively for minimal invasive surgery. Recurrence depends on the long-term follow-up, and more cases are needed to further evaluate our technique. The real-time contrast medium technique for Spinal Arachnoid cysts contributes to the complete ligation with minimally invasive surgery.
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Utilizing real-time contrast medium to detect the fistula of giant Spinal Arachnoid cyst and treat with minimal invasive surgery
BMC, 2019Co-Authors: Guangyu Ying, Kaisheng Chang, Yajuan Tang, Chunyuan Cheng, Yongjian Zhu, Chienmin ChenAbstract:Abstract Background Spinal Arachnoid cysts are rare and have varied clinical manifestations depending on the affected Spinal region and nerve roots. A complete cyst excision with fistula closure is the first choice of treatment. However, it might be difficult to localize the specific position of the fistula because previous images have no enhancements or the fistula is too tiny to be detected. Case presentation This case is a giant lumbar extradural Arachnoid cyst. We administered a lumbar injection with contrast medium into subArachnoid space under digital subtraction angiography (DSA) and disclosed the fistula. Confirming the location of fistula enabled us to perform minimally invasive surgery to ligate the fistula. Surgical intervention for a Spinal Arachnoid cyst might encounter the problem of the formation of a postoperative cerebroSpinal fluid (CSF) fistula. We propose the option of detecting the fistula preoperatively for minimal invasive surgery. Recurrence depends on the long-term follow-up, and more cases are needed to further evaluate our technique. Conclusions The real-time contrast medium technique for Spinal Arachnoid cysts contributes to the complete ligation with minimally invasive surgery
Toru Matsui - One of the best experts on this subject based on the ideXlab platform.
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dorsal Spinal Arachnoid web diagnosed with the quantitative measurement of cerebroSpinal fluid flow on magnetic resonance imaging
Journal of Neurosurgery, 2014Co-Authors: Han Soo Chang, Atsushi Nagai, Soichi Oya, Toru MatsuiAbstract:An Arachnoid web is an abnormal formation of the Arachnoid membrane in the Spinal subArachnoid space that blocks CSF flow and causes syringomyelia. Although the precise mechanism of syrinx formation is unknown, dissection of the Arachnoid web shrinks the syrinx and improves symptoms. Precisely determining the location of the Arachnoid web is difficult preoperatively, however, because the fine structure generally cannot be visualized in usual MRI sequences. In this report the authors describe 2 cases of Arachnoid web in which the web was preoperatively identified using quantitative CSF flow analysis of MRI. By analyzing cardiac-gated phase-contrast cine-mode MRI in multiple axial planes, the authors precisely localized the obstruction of CSF flow on the dorsal side of the Spinal cord in both patients. This technique also revealed a 1-way valve-like function of the Arachnoid webs. Imaging led to the early diagnosis of myelopathy related to the derangement of CSF flow and allowed the authors to successfully ...
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dorsal Spinal Arachnoid web diagnosed with the quantitative measurement of cerebroSpinal fluid flow on magnetic resonance imaging
Journal of Neurosurgery, 2014Co-Authors: Han Soo Chang, Atsushi Nagai, Soichi Oya, Toru MatsuiAbstract:An Arachnoid web is an abnormal formation of the Arachnoid membrane in the Spinal subArachnoid space that blocks CSF flow and causes syringomyelia. Although the precise mechanism of syrinx formation is unknown, dissection of the Arachnoid web shrinks the syrinx and improves symptoms. Precisely determining the location of the Arachnoid web is difficult preoperatively, however, because the fine structure generally cannot be visualized in usual MRI sequences. In this report the authors describe 2 cases of Arachnoid web in which the web was preoperatively identified using quantitative CSF flow analysis of MRI. By analyzing cardiac-gated phase-contrast cine-mode MRI in multiple axial planes, the authors precisely localized the obstruction of CSF flow on the dorsal side of the Spinal cord in both patients. This technique also revealed a 1-way valve-like function of the Arachnoid webs. Imaging led to the early diagnosis of myelopathy related to the derangement of CSF flow and allowed the authors to successfully excise the webs through limited surgical exposure.
Mani Charan Satapathy - One of the best experts on this subject based on the ideXlab platform.
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intradural Spinal Arachnoid cyst a long term postlaminectomy complication a case report and review of the literature
World Neurosurgery, 2016Co-Authors: Pratap Chandra Nath, Sudhansu Sekhar Mishra, Rama Chandra Deo, Mani Charan SatapathyAbstract:Background Spinal Arachnoid cysts are a rare cause of Spinal cord compression. Intradural Arachnoid cysts are rarer than extradural Arachnoid cysts. Spinal Arachnoid cysts are mostly congenital in origin. Arachnoid cysts due to trauma, lumbar puncture, or surgery are rarely reported. Most Arachnoid cysts are located posterior to the Spinal cord in the thoracic regions. The ideal treatment is laminectomy or laminoplasty with puncture, marsupialization, or excision. But the development of a cervico-thoracic Spinal intradural extramedullary Arachnoid cyst anteriorly located 28 years after laminectomy is a recognizable complication of laminectomy. Case Description We report here a case of a 45-year-old man who underwent C6-T1 laminectomy at the age of 17 years for cervical intervertebral disc prolapse (C6/7, C7/T1) and compressive myelopathy. Twenty-eight years after laminectomy, he developed spastic quadriparesis and was diagnosed with a Spinal intradural extramedullary anterior Arachnoid cyst at the laminectomy site with compressive myelopathy. Conclusions So, although laminectomy with excision is usually practiced to treat Spinal Arachnoid cysts, laminectomy itself is a cause of development of intradural Arachnoid cysts.
Marcelo Olarte - One of the best experts on this subject based on the ideXlab platform.
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chronic myelopathy due to a giant Spinal Arachnoid cyst a complication of the intrathecal injection of phenol case report
Journal of Neurosurgery, 2008Co-Authors: Fred Rincon, J Mocco, Ricardo J Komotar, Alexander G Khandji, Paul C Mccormick, Marcelo OlarteAbstract:Acquired intradural Arachnoid cystic lesions of the spine have been associated with trauma, hemorrhage, parasitic infections, and other insults that cause inflammation and subArachnoid adhesions. The authors describe the case of a previously healthy 36-year-old woman who presented with a chronic myelopathy due to the progressive development of a giant Spinal Arachnoid cyst that resulted after the intrathecal injection of phenol for the management of chronic upper extremity pain. Neurological examination, Spinal computed tomography, and magnetic resonance imaging were used for diagnostic and follow-up purposes. Even after the initial excision of the cyst, the patient remained symptomatic with minimal functional recovery.