Publications by authors named "Eric Chalif"

Objective: Spinal meningioma (SM) is a pathology with an estimated incidence of nearly 1000 diagnoses per year in the United States and presents in 20% of patients with neurofibromatosis type 2 (NF2). This multi-institutional retrospective cohort study aimed to assess clinical outcomes for patients with SM who underwent surgery between 1998 and 2020 with stratification by NF2 mutation status.

Methods: Medical records were reviewed retrospectively to collect data on patient demographics, clinical presentation, tumor characteristics, treatment, and outcomes.

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Spine surgery has significantly progressed due to innovations in surgical techniques, technology, and a deeper understanding of spinal pathology. However, numerous challenges persist, complicating successful outcomes. Anatomical intricacies at transitional junctions demand precise surgical expertise to avoid complications.

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  • The study investigates post-operative radiographic changes in patients treated for degenerative scoliosis with transforaminal lumbar interbody fusion (TLIF) over time, focusing on patients without instrument failure.
  • A cohort of 114 patients was narrowed down to 39 who had clear imaging results, with some receiving primary procedures and others revising earlier surgeries.
  • Results showed that primary TLIF patients maintained significant improvements in spinal alignment measures for at least a year, while revision patients had less consistent outcomes, indicating differing levels of effectiveness between primary and revision surgeries.
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  • Socioeconomic status (SES) influences treatment choices and outcomes for prolactinoma patients, with this study aiming to evaluate its effects specifically on surgical versus medical interventions.
  • The research involved analyzing records from 568 prolactinoma patients, revealing that lower-income individuals were more likely to undergo surgery and had specific indications for surgical intervention.
  • Post-surgery, patients who achieved remission had higher income levels, while other SES factors did not significantly affect remission rates in either surgical or medical treatment groups.
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Purpose: Pituitary carcinomas are a rare entity that respond poorly to multimodal therapy. Patients follow a variable disease course that remains ill-defined.

Methods: We present an institutional case series of patients treated for pituitary carcinomas over a 30-year period from 1992 to 2022.

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Objective: Risk-standardized mortality rates (RSMRs) have recently been shown to outperform facility case volume as a proxy for surgical quality in lung and gastrointestinal cancer. The aim of this study was to investigate RSMR as a surgical quality metric in primary CNS cancer.

Methods: This retrospective observational cohort study used data from the National Cancer Database, a population-based oncology outcomes database sourced from more than 1500 institutions in the United States, and included adult patients 18 years of age and older who were diagnosed with glioblastoma, pituitary adenoma, or meningioma and were treated with surgery.

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Objective: Maximal safe resection is the standard of care for patients presenting with lesions concerning for glioblastoma (GBM) on magnetic resonance imaging (MRI). Currently, there is no consensus on surgical urgency for patients with an excellent performance status, which complicates patient counseling and may increase patient anxiety. This study aims to assess the impact of time to surgery (TTS) on clinical and survival outcomes in patients with GBM.

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Anterior lumbar interbody fusion (ALIF) has become an increasingly popular and effective treatment modality for various conditions of the lumbar spine. However, complications after this procedure can be costly. Surgical site infections (SSIs) are one of these types of complications.

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Objective: We present an institutional case series of patients treated for colorectal carcinoma (CRC) spinal metastases to investigate the outcomes between no treatment, radiation, surgery, and surgery/radiation.

Methods: A retrospective cohort of patients with CRC spinal metastases presenting to affiliated institutions between 2001 and 2021 wereidentified. Information related to patient demographics, treatment modality, treatment outcomes, symptom improvement, and survival was collected by chart review.

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Cancer-associated fibroblasts (CAFs) were presumed absent in glioblastoma given the lack of brain fibroblasts. Serial trypsinization of glioblastoma specimens yielded cells with CAF morphology and single-cell transcriptomic profiles based on their lack of copy number variations (CNVs) and elevated individual cell CAF probability scores derived from the expression of 9 CAF markers and absence of 5 markers from non-CAF stromal cells sharing features with CAFs. Cells without CNVs and with high CAF probability scores were identified in single-cell RNA-Seq of 12 patient glioblastomas.

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Background Content: Diffuse gliomas of the spine (DGS)-consisting of intradural intramedullary glioblastoma, astrocytoma, and oligodendroglioma-are exceedingly rare tumors that account for about 2% of primary spinal cord tumors. Much is unknown about their optimal treatment regimen due to a relative lack of clinical outcome data.

Purpose: To provide an updated analysis on treatment and outcomes in DGS.

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Idiopathic intracranial hypertension (IIH), also called pseudotumor cerebri syndrome, is a disorder defined as elevated intracranial pressure (ICP) of unknown cause. It is a diagnosis of exclusion in most cases, and all other forms of elevated ICP must be ruled out. With its increasing prevalence, it is much more likely for physicians, otolaryngologists included, to encounter this condition.

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Background: Postoperative hemorrhage is a rare but potentially serious complication after pituitary surgery. The risk factors for this complication are mostly unknown, and further knowledge would help guide postoperative management.

Objective: To investigate the perioperative risks and clinical presentation of significant postoperative hemorrhage (SPH) after endonasal surgery for pituitary neuroendocrine tumors.

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Background: Limited data exist on pediatric central nervous system (CNS) tumors, and the results from the National Cancer Database, the largest multicenter national cancer registry, have not previously been comprehensively reported.

Objective: To capture pediatric neurosurgical outcomes and investigate possible disparities of care.

Methods: The National Cancer Database was queried for pediatric patients who were diagnosed with CNS tumors from 2004 to 2018.

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Introduction The use of magnetoencephalography (MEG) in localizing epileptic foci and directing surgical treatment of medically refractory epilepsy is well established in clinical practice; however, it has not yet been incorporated into the routine planning of stereo-electroencephalography (EEG) (SEEG) depth electrode trajectories during invasive intracranial evaluation for epileptic foci localization. In this study, we assess the impact of MEG-directed SEEG on seizure outcomes in a pediatric cohort. Methods A retrospective analysis was performed on a single-institution cohort of pediatric patients with medically refractory epilepsy who underwent epilepsy surgery.

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Objective: To examine complication rates and radiographic outcomes in patients undergoing surgery for adult spinal deformity (ASD) by a junior surgeon.

Methods: A study was conducted of a retrospective cohort of patients who underwent an open posterior interbody fusion of the thoracic and/or lumbar regions by a single surgeon for ASD between 2018 and 2022. Patient characteristics, complications, and common radiographic parameters of spinopelvic alignment were collated.

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Aim: To compare the perioperative outcomes between single-day combined or separate-day staged surgeries for cervical spinal stenosis.

Material And Methods: A retrospective cohort analysis was conducted on consecutive patients admitted at a single institution between July 2015 and April 2019, who underwent either single-day combined or separate-day staged surgeries during the same hospitalization period. Demographics, comorbidities, hospital length of stay, and perioperative complications were compared between the patient groups.

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Objective: Decision-making in how to manage pituitary adenomas (PAs) in the elderly (age ≥ 65 years) can be challenging given the benign nature of these tumors and concerns about surgical morbidity in these patients. In this study involving a large multicenter national registry, the authors examined treatment trends and surgical outcomes in elderly compared to nonelderly patients.

Methods: The National Cancer Data Base (NCDB) was queried for adults aged ≥ 18 years with PA diagnosed by MRI (in observed cases) or pathology (in surgical cases) from 2004 to 2016.

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Background: Limited retrospective data exist on malignant pineal parenchymal tumors (PPTs) in adults, and there are no large previous studies that review clinical outcomes across the 3 treatment arms of surgery, radiotherapy, and chemotherapy. As a result, optimal disease management has yet to be defined.

Objective: To evaluate treatment trends and perform survival analysis in adult PPT.

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Objective: Giant pituitary adenomas (PAs), defined as 4 cm or greater at their maximum diameter, are commonly treated with neurosurgical intervention as the first-line therapy. However, existing studies are from high-volume institutions whose outcomes may not be representative of many cancer centers. In the present study, the authors use a large cancer registry to evaluate demographics, national treatment trends, and outcomes by facility volume to address knowledge gaps for this uncommon tumor.

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Glioblastoma is the most aggressive brain tumor with a median survival ranging from 6.2 to 16.7 months.

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