Related Experiment Video
Updated: Nov 30, 2025
07:11
Treatment of Facial Deformities using 3D Planning and Printing of Patient-Specific Implants
Published on: May 23, 2020
7.7K
Chiari 1.5 malformation, accessory odontoid synchondrosis, and ventral compression: case report
Dany Hage1, Joe Iwanaga1,2, C J Bui3
1Department of Neurosurgery, Tulane Center for Clinical Neurosciences, Tulane University School of Medicine, New Orleans, LA, USA.
Anatomy & Cell Biology
|November 16, 2020
Summary
Chiari 1.5 malformations involve brainstem herniation and have higher surgical complication rates than Chiari 1. Understanding accessory odontoid synchondroses may improve treatment for these rare Chiari malformations.
Area of Science:
- Neurosurgery
- Developmental Biology
- Radiology
Background:
- Chiari 1 malformations are linked to reduced posterior cranial fossa volume.
- Differentiating Chiari 1.5 from Chiari 1 is crucial due to differing surgical complication rates.
Observation:
- Chiari 1.5 malformations present with caudal brainstem herniation through the foramen magnum.
- Patients with Chiari 1.5 malformations experience higher complication rates after posterior decompression surgery.
Findings:
- This study presents a rare case of an accessory odontoid synchondrosis in a patient with Chiari 1.5 malformation.
- The patient presented with significant ventral compression.
Implications:
- Improved understanding of odontoid synchondroses may enhance the diagnosis and treatment of Chiari malformations.
- This case highlights the importance of detailed anatomical assessment in complex Chiari presentations.
Related Concept Videos
01:12General Case of Eccentric Axial Loading
365
Unsymmetrical bending occurs when the bending moment applied to a structural member does not align with its principal axis. This misalignment leads to complex stress distributions and deflection patterns that differ from symmetrical bending, which are essential for designing structures to withstand different loading conditions.
Consider a member subjected to equal and opposite forces that are applied along a line that does not coincide with the member's neutral axis. In unsymmetrical...
Consider a member subjected to equal and opposite forces that are applied along a line that does not coincide with the member's neutral axis. In unsymmetrical...
365
01:14Cranial Bones: Superior and Posterior View
4.4K
The superior view of the cranium shows the frontal and paired parietal bones.
The frontal bone is the single bone that forms the forehead. At its anterior midline, between the eyebrows, there is a slight depression called the glabella. The frontal bone also forms the supraorbital margin of the orbit. Near the middle of this margin is the supraorbital foramen, the opening that provides passage for a sensory nerve to the forehead. The frontal bone is thickened just above each supraorbital margin,...
The frontal bone is the single bone that forms the forehead. At its anterior midline, between the eyebrows, there is a slight depression called the glabella. The frontal bone also forms the supraorbital margin of the orbit. Near the middle of this margin is the supraorbital foramen, the opening that provides passage for a sensory nerve to the forehead. The frontal bone is thickened just above each supraorbital margin,...
4.4K
01:27Cranial Bones: Lateral View
4.0K
The lateral view of the cranium is dominated by temporal, sphenoid, and ethmoid bones.
The temporal bone forms the lower lateral side of the skull. The temporal bone is subdivided into several regions. The flattened upper portion is the squamous portion of the temporal bone. Below this area and projecting anteriorly is the zygomatic process of the temporal bone, which forms the posterior portion of the zygomatic arch. Posteriorly is the mastoid portion of the temporal bone. Projecting...
The temporal bone forms the lower lateral side of the skull. The temporal bone is subdivided into several regions. The flattened upper portion is the squamous portion of the temporal bone. Below this area and projecting anteriorly is the zygomatic process of the temporal bone, which forms the posterior portion of the zygomatic arch. Posteriorly is the mastoid portion of the temporal bone. Projecting...
4.0K
01:28Articulations of the Vertebral Column
2.7K
In addition to being held together by the intervertebral discs, adjacent vertebrae also articulate with each other at synovial joints formed between the superior and inferior articular processes called zygapophysial joints (facet joints). These are plane joints that provide for only limited motions between the vertebrae. The orientation of the articular processes at these joints varies in different regions of the vertebral column and serves to determine the types of motions available in each...
2.7K