Publications by authors named "Aria Jamshidi"

Article Synopsis
  • Epidural arteriovenous fistulas (eAVFs) are rare vascular issues often confused with intradural ones, impacting treatment and outcomes.
  • A case of a 68-year-old man initially diagnosed with a likely intradural fistula was actually found to have an epidural lesion during surgery, leading to significant improvement after treatment.
  • The findings emphasize the need for better imaging techniques and a collaborative medical approach to accurately identify and treat spinal vascular malformations.
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Background: Adjacent segment disease (ASD) is a known sequela of thoracolumbar instrumented fusions. Various surgical options are available to address ASD in patients with intractable symptoms who have failed conservative measures. However, the optimal treatment strategy for symptomatic ASD has not been established.

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Objective: Chordomas are a rare and relatively slow-growing malignancy of notochordal origin with a nearly 50% recurrence rate. Chordomas of the cervical spine are particularly challenging tumors given surrounding vital anatomical structures. Although standard in other areas of the spine, en bloc resection of cervical chordomas is exceedingly difficult and carries the risk of significant postoperative morbidity.

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Introduction: To evaluate the outcomes and demographics of encephalocele patients who were born and received treatment in our neonatal ICU and conduct a PRISMA literature review.

Methods: An Institutional Review Board (IRB)-approved retrospective cohort study was undertaken to investigate the results of treating encephalocele patients at Jackson Memorial Hospital (JMH) from 1998 to 2022. The study focused on assessing outcomes and the impact of maternal socioeconomic factors, such as religion, age, and education, along with the timing of diagnosis, in connection with a systematic review.

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Article Synopsis
  • The Kaplan-Meier method can overestimate the risk of cancer coming back, especially when other events like death happen first, but the Aalen-Johansen method can give a more accurate picture by considering these events.
  • A study looked at research articles about meningiomas (a type of brain tumor) since 2020 and found that only a few used the better method.
  • It showed that not using the Aalen-Johansen method mostly led to overestimating the recurrence risk, especially in older patients with more serious tumors.
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Meningiomas are one of the most common intradural extramedullary tumors.1 Symptoms often arise from cord compression, with gross total resection leading to the most optimal patient outcomes.2,3 Utilization of intraoperative neurophysiological monitoring can increase patient safety through real-time assessment of neural structures and reduce postoperative neurologic complications.

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Objective: Resection of spinal nerve sheath tumors (SNSTs) typically necessitates laminectomy, often with facetectomy, for adequate exposure of tumor. While removal of bone affords a greater operative window and extent of resection, it places the patient at greater risk for spinal instability. Although studies have identified risk factors for fusion at the time of tumor resection, there has yet to be a study assessing long-term stability following SNST resection.

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Objective: Patients requiring intrathecal baclofen (ITB) therapy are at high risk for surgical site infections (SSIs) given their poor functional status. After years of a nominal infection rate, there was an inexplicable increase in ITB pump infections at the authors' institution and multiple investigations offered no solution. Use of intraoperative topical antibiotics is well-documented in the orthopedic literature and was considered for ITB pump insertion.

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Background: Lumbar pars defects are common in adolescent athletes and are often due to recurrent axial loading and traumatic stressors.

Objective: To present an updated case series of young athletes who underwent percutaneous direct pars repair after failure of conservative management.

Methods: A single-center, nonrandomized, retrospective observation study of athletes who were referred for minimally invasive direct pars repair after failure of at least 6 months of conservative management was performed.

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Background: Craniovertebral junction (CVJ) cysts, including retro-odontoid pseudotumors, are challenging pathologies to treat and manage effectively. Surgical intervention is indicated when these lesions result in progressive myelopathy, intractable pain, or instability.

Objective: To present a case series of older patients who underwent successful resection retro-odontoid lesions using transdural approach.

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Background: The creation of sagittal balance of the spine is critical in the treatment adult spinal deformity. Anterior column release (ACR) has gained traction as a minimally invasive alternative to pedicle subtraction osteotomy. By releasing the anterior longitudinal ligament, the anterior column can be lengthened and physiologic lordosis restored.

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Background: Cerebral extracranial-intracranial (EC-IC) direct bypass is a commonly used procedure for the treatment of cerebral hypoperfusion secondary to chronic steno-occlusive vasculopathy. We sought to determine clinical outcomes, intraoperative blood flow analysis, long term follow up, and long term patency rates from a single surgeon's series of direct cerebral bypass for moyamoya disease, moyamoya syndrome, and steno-occlusive disease.

Methods: We reviewed clinical, demographic, operative and neuroimaging records for all patients who underwent a direct EC-IC bypass by the senior author between August 1999 and November 2020.

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Objective: The purpose of this study is to retrospectively evaluate the clinical and surgical outcomes of a large surgical series of vestibular schwannoma from North America over 20 years.

Methods: After institutional review board approval a retrospective review of the senior author's personal case logs to identify patients who had operations for vestibular schwannoma was performed. The clinical notes, operative record, preoperative and postoperative imagings, and long-term clinical follow-up notes were evaluated.

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Transradial access (TRA) has gained traction in neurointerventions as studies continue to demonstrate improved access site safety and equivalent end artery effectiveness when compared with traditional transfemoral techniques. Herein, we describe the technical nuances of obtaining TRA with a focus on distal TRA, left TRA, and sheathless TRA using larger bore catheters. We also discuss various strategies to avoid access site conversion if radial artery spasm or radial anomalies are encountered and offer some solutions for forming the Simmons catheter especially when it cannot be performed in the descending aorta.

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Background/aims: Iatrogenic CSF leaks after endoscopic endonasal transsphenoidal surgery remain a challenging entity to manage, typically treated with CSF diversion via lumbar drainage.

Objective: To assess the safety and efficacy of high-volume lumbar puncture (LP) and acetazolamide therapy to manage iatrogenic CSF leaks.

Methods: We performed a prospective pilot study of four patients who developed iatrogenic postoperative CSF leaks after transsphenoidal surgery and analyzed their response to treatment with concomitant high-volume lumbar puncture followed by acetazolamide therapy for 10 days.

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Background: Although studies have continued to demonstrate the advantages of transradial access (TRA) for neurointervention, radial artery spasm (RAS) has remained a frequent cause of TRA failure. Dotter and Judkins initially described a technique to dilate areas of peripheral vascular stenosis by advancing sequentially larger catheters across the lesion over a guidewire. We have presented our institutional experience with the use of a modified Dotter technique with long radial sheaths to dilate areas of proximal flow-limiting RAS.

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Objective: High-grade lumbar spondylolisthesis (HGLS) remains a challenging surgical entity, and there is no current consensus regarding optimal surgical approach. The purpose of this study was to systematically review the literature for studies utilizing the reverse or modified Bohlman technique for the treatment of HGLS to assess their safety and efficacy.

Methods: The authors performed a literature search of PubMed/MEDLINE electronic databases from their inception according to the PRISMA guidelines.

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As the aging population continues to grow, so will the incidence of age-related conditions, including idiopathic normal pressure hydrocephalus (iNPH). The pathogenesis of iNPH remains elusive, and this is due in part to the poor characterization of cerebral spinal fluid (CSF) dynamics within the brain. Advancements in technology and imaging techniques have enabled new breakthroughs in understanding CSF physiology, and therefore iNPH pathogenesis.

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Torcular dural sinus malformations (tDSMs) represent a rare subset of paediatric cerebrovascular malformations and are often diagnosed antenatally via ultrasound. The management of these in utero lesions remains controversial as previous studies suggested elective termination of the pregnancy because of their presumably high mortality and severe long-term morbidity. However, more recent evaluations have suggested that the overall prognosis for infants harbouring these lesions may be much better than previously believed.

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Transradial access has become increasingly used in neurointerventions because it reduces access site complications. However, radial artery anomalies can be difficult to navigate, often necessitating conversion to femoral access. We describe the case of a female patient in her early 70 s who underwent preoperative embolization of a carotid body tumor via right transradial access.

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Augmented reality (AR) is a novel technology for spine navigation. This tracking camera-integrated head-mounted display (HMD) represents a novel stereotactic computer navigation modality that has demonstrated excellent precision and accuracy with spinal instrumentation.1 Standard computer-assisted spine navigation systems have two major shortcomings: attention shift and line-of-sight limitations.

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Transradial access (TRA) has become increasingly utilized in neurointerventions because it reduces access site complications. However, radial artery anomalies can be difficult to navigate, often necessitating conversion to femoral access. We describe the case of a female patient in her early 70s who underwent preoperative embolization of a carotid body tumor via right TRA.

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