Publications by authors named "Mark Zaki"

Objectives: To determine if piecemeal separation surgery, in conjunction with smaller treatment volumes utilized with spine stereotactic radiation therapy (S-SBRT), increased the risk of adjacent level progression (ALP).

Methods: We performed a retrospective analysis of a prospectively maintained database of adult spine oncologic patients who underwent SBRT to the spine at University of Michigan from 2010 to 2021. We compared ALP in patients undergoing SBRT who had pretreatment surgery with those who did not.

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Introduction: As illicit drug manufacturers find new ways to market their products and increase their profit margins, multiple contaminants have found their way into the illicit drug supply. The newest addition, xylazine, also known as "tranq," has spread through the city of Philadelphia and has recently been gaining ground across the United States, including in the state of Florida.

Case Presentation: This case describes a 37-year-old male with a significant past psychiatric history of severe polysubstance intravenous (IV) use, including fentanyl and methamphetamine.

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Background And Context: Unplanned readmission within 30 days following elective spine surgery is a key indicator of quality of care, as readmissions often signal early complications or poor recovery. The Hospital Readmission Reduction Program (HRRP) and the Centers for Medicare and Medicaid Services (CMS) utilizes this metric to assess hospital and surgeon performance.

Purpose: Here we aim to delineate quality of care metrics for full-endoscopic spine surgery (FESS) compared to traditional spine surgery.

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Purpose: Prospective trials have reported isotoxicity and improved oncologic outcomes with external beam radiation therapy (EBRT) microboost to a dominant intraprostatic lesion. There is often variability in the rate of adoption of new treatments, and current microboost practice patterns are unknown. We leveraged prospectively collected data from the multicenter Michigan Radiation Oncology Quality Consortium to understand the current state of microboost usage for localized prostate cancer.

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Spinal metastases can be contained in the bone or have epidural spread. Whether the extent of epidural involvement changes tumor response to therapy is unknown. The decision of when to treat disease progression with focal radiation therapy with or without surgery vs.

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Article Synopsis
  • Degenerative spondylolisthesis is a common cause of chronic back pain in adults, and while the standard treatment is open decompression with or without fusion, there is growing interest in the effectiveness of full endoscopic spine surgery as an alternative.
  • A study involving 73 patients with low-grade degenerative spondylolisthesis revealed that after undergoing lumbar endoscopic unilateral laminectomy, 70 patients experienced significant improvement in symptoms and pain levels at various follow-up periods (3, 9, and 12 months).
  • The results indicate that this endoscopic approach is a safe option for treating patients with severe stenosis due to low-grade degenerative spondylolisthesis, suggesting the
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Background And Objectives: Emergency department (ED) utilization and readmission rates after spine surgery are common quality of care measures. Limited data exist on the evaluation of quality indicators after full-endoscopic spine surgery (FESS). The objective of this study was to detect rates, causes, and risk factors for unplanned postoperative clinic utilization after FESS.

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Purpose: For men with intermediate-risk prostate cancer treated with definitive therapy, the addition of androgen deprivation therapy (ADT) reduces the risk of distant metastasis and cancer-related mortality. However, the absolute benefit of ADT varies by baseline cancer risk. Estimates of prognosis have improved over time, and little is known about ADT decision making in the modern era.

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Article Synopsis
  • This study looked at how well implants were placed in the lower spine using robots compared to traditional methods.
  • It found that robotic methods were much more accurate than the older technique, leading to better outcomes for patients.
  • Overall, there were very few problems after the surgery, making both methods safe, but robots did a better job!
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Objective: Achieving appropriate spinopelvic alignment has been shown to be associated with improved clinical symptoms. However, measurement of spinopelvic radiographic parameters is time-intensive and interobserver reliability is a concern. Automated measurement tools have the promise of rapid and consistent measurements, but existing tools are still limited to some degree by manual user-entry requirements.

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Objective: Emergency department visits 90 days after elective spinal surgery are relatively common, with rates ranging from 9% to 29%. Emergency visits are very costly, so their reduction is of importance. This study's objective was to evaluate the reasons for emergency department visits and determine potentially modifiable risk factors.

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Objective: Lateral-access spine surgery has many benefits, but adoption has been limited by a steep learning curve. Virtual reality (VR) is gaining popularity and lends itself as a useful tool in enhancing neurosurgical resident education. We thus sought to assess whether VR-based simulation could enhance the training of neurosurgery residents in lateral spine surgery.

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Background And Objective: Malignant epidural spinal cord compression (MESCC), often presenting with back pain and motor/sensory deficits, is associated with poor survival, particularly when there is loss of ambulation. The purpose of this review is to evaluate the literature and discuss appropriate workup and management of MESCC, specifically in the emergent setting.

Methods: A PubMed search was conducted on "spinal cord compression" and "radiation therapy.

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Background: As cancer therapies have improved, spinal metastases are increasingly common. Resulting complications have a significant impact on patient's quality of life. Optimal methods of surveillance and avoidance of neurologic deficits are understudied.

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Background: The outcomes for patients with metastatic renal cell carcinoma (RCC) to the spine who underwent stereotactic body radiotherapy (SBRT) through a multidisciplinary spine oncology program are not well described. We sought to describe the clinical course and local control rates at 1 and 2 years for these patients.

Methods: A retrospective analysis of a prospectively maintained database of adult oncologic patients receiving SBRT to the spine through a multidisciplinary spine oncology program at a single institution from 2010 to 2021 was performed.

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Objective: Robot-assisted pedicle screw placement in spinal fusion has been well studied. However, few studies have evaluated robot-assisted sacroiliac joint (SIJ) fusion. The aim of this study was to compare surgical characteristics, accuracy, and complications between robot-assisted and fluoroscopically guided SIJ fusion.

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Objective: Patient-reported outcomes (PROs) have become the standard means to measure surgical outcomes. Insurers and policy makers are also increasingly utilizing PROs to assess the value of care and measure different aspects of a patient's condition. For cervical myelopathy, it is currently unclear which outcome measure best reflects patient satisfaction.

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Retropleural, retrodiaphragmatic, and retroperitoneal approaches are utilized to access difficult thoracolumbar junction (T10-L2) pathology. The authors present a 58-year-old man with chronic low-back pain who failed years of conservative therapy. Preoperative radiographs demonstrated significant levoconvex scoliosis with coronal and sagittal imbalance.

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Transcription factors (TFs) play a cardinal role in the development and maintenance of human physiology by acting as mediators of gene expression and cell state control. Recent advancements have broadened our knowledge on the potency of TFs in governing cell physiology and have deepened our understanding of the mechanisms through which they exert this control. The ability of TFs to program cell fates has gathered significant interest in recent decades, and high-throughput technologies now allow for the systematic discovery of forward programming factors to convert pluripotent stem cells into numerous differentiated cell types.

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Objective: Sports injuries are known to present a high risk of spinal trauma. The authors hypothesized that different sports predispose participants to different injuries and injury severities.

Methods: The authors conducted a retrospective cohort analysis of adult patients who experienced a sports-related traumatic spinal injury (TSI), including spinal fractures and spinal cord injuries (SCIs), encoded within the National Trauma Data Bank from 2011 through 2014.

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Objective: Image guidance requires placement of a dynamic reference frame (DRF), often either onto local spinous process or by freehand intraosseous DRF placement into the ilium via the posterior superior iliac spine (PSIS). There is a paucity of studies in the literature that describe the complications of intraosseous DRF placement. The aim of this study was to describe the radiographic location, prevalence and nature of complications, and long-term clinical outcomes of attempted DRF placement into the PSIS.

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Objective: Despite understanding the associated adverse outcomes, identifying hospitalized patients at risk for sepsis is challenging. The authors aimed to characterize the epidemiology and clinical risk of sepsis in patients who underwent vertebral fracture repair for traumatic spinal injury (TSI).

Methods: The authors conducted a retrospective cohort analysis of adults undergoing vertebral fracture repair during initial hospitalization after TSI who were registered in the National Trauma Data Bank from 2011 to 2014.

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Objective: Cervical spine injury screening is common practice for traumatic brain injury (TBI) patients. However, risk factors for concomitant thoracolumbar trauma remain unknown. We characterized epidemiology and clinical risk for concomitant thoracolumbar trauma in TBI.

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Objective: Venous thromboembolism (VTE) can cause significant morbidity and mortality in hospitalized patients, and may disproportionately occur in patients with limited mobility following spinal trauma. The authors aimed to characterize the epidemiology and clinical predictors of VTE in pediatric patients following traumatic spinal injuries (TSIs).

Methods: The authors conducted a retrospective cohort analysis of children who experienced TSI, including spinal fractures and spinal cord injuries, encoded within the National Trauma Data Bank from 2011 to 2014.

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