This study examined the safe zone for placement of occipital screws without endangering the sinuses. In the first part of the study, 10 cadaveric skulls were exposed. The borders of the confluences and the transverse sinuses were located on the outer table of the occiput. In the second part of the study, six cadaveric skulls were used and screws were placed in different sites and angiography of the venous sinuses was performed. The exact location of the venous sinuses on the outer table of the occiput were analyzed. The examination of the relationship between occipital screws placed at different sites and the venous sinuses clearly demonstrated that whenever the screws were inserted at the level of the external occipital protuberance, or 1 cm below it, sinus injury could rarely be avoided. To enhance the safety of the occipitocervical fusion, the external occipital protuberance should be avoided, and occipital screws should be placed at least 2 cm below the superior nuchal line.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.3928/0147-7447-20000701-20 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Transorbital laser surgery for epilepsy: Anatomic-radiological feasibility of transorbital magnetic resonance imaging-guided laser interstitial thermal therapy (MRIgLITT) for amygdalohippocampectomy in refractory epilepsy.
Clin Neurol Neurosurg
January 2025
Department of Neurosurgery, Hospital Clínic de Barcelona, Barcelona, Spain; Universitat de Barcelona, Barcelona, Spain; Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain.
Objective: to study the anatomical feasibility of laser fiber insertion for interstitial thermal therapy via transorbital approach to the temporo-mesial structures (amygdala-hippocampus-parahippocampus complex).
Methods: Anatomical dissections were performed bilaterally on two human cadaveric heads via a transorbital approach, in which screws and laser fibers were used for magnetic resonance imaging-guided laser interstitial thermal therapy (MRIgLITT) assisted by neuronavigation. In addition, eight transorbital trajectories were simulated using the transorbital entry points obtained from a cadaveric radiological study of four patients previously operated on for mesial temporal lobe epilepsy.
The Impact of Intraoperative CT-Based Navigation in Congenital Craniovertebral Junction Anomalies: New Concepts of Treatment.
Brain Sci
December 2024
Department of Neurosurgery, IRCSS Humanitas Research Hospital, Via Alessandro Manzoni 56, 20089 Rozzano, Milan, Italy.
Background: Congenital craniovertebral junction anomalies (CCVJAs) encompass a diverse range of conditions characterized by distorted anatomy and significant variation in the pathways of neurovascular structures. This study aims to assess the safety and feasibility of tailoring posterior fixation for CCVJAs through intraoperative CT-based navigation.
Methods: An in-depth retrospective analysis was conducted on eight patients diagnosed with CCVJAs (excluding Arnold-Chiari malformation).
Introduction: Sagittal synostosis (SS) is the most prevalent form of craniosynostosis. It is the premature fusion of the sagittal suture, resulting in a "boat like" skull shape. Early surgical intervention is crucial to prevent complications, yet no standard procedure exists for patients over 12 months old.
View Article and Find Full Text PDFNavigation-assisted occipitocervical fixation and decompression in a patient with polyostotic fibrous dysplasia.
J Craniovertebr Junction Spine
September 2024
Department of Neurosurgery, Nagoya University Graduate School of Medicine, Nagoya, Japan.
Fibrous dysplasia (FD) is a rare skeletal disorder characterized by the replacement of normal bone with fibrous connective tissue, leading to abnormal bone formation. This case report details the successful treatment of a 61-year-old woman with FD at the craniovertebral junction (CVJ). The patient, who had a history of intracranial meningioma and had already been diagnosed with FD, experienced worsening gait disturbance and muscle weakness following a fall.
View Article and Find Full Text PDFOdontoid remodeling with occipital condyle stabilization in patients with metastatic C2 involvement.
J Craniovertebr Junction Spine
September 2024
Spine Center, Koc University Hospital, Istanbul, Turkey.
The occipitocervical junction (OCJ) is a complex anatomical region crucial for protecting the lower brain stem, upper spinal cord, and lower cranial nerves. Instability in this area can lead to severe outcomes such as chronic pain, neurological deficits, or death. Various surgical techniques have been developed for OCJ stabilization, particularly using occipital condyle screws, which have shown promise in providing stability and preserving neck rotation.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!