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Floating Laminoplasty for the Treatment of Compressive Myelopathy Accompanied by C1 Posterior Ring Hypoplasia: A Technical Note and Case Series.
World Neurosurg
June 2023
Department of Orthopedic Surgery, Jeju National University Hospital, Jeju University School of Medicine, Jejudo, Korea.
Posterior ring hypoplasia of the atlas (C1) is not common and in most cases is found by chance without symptoms. This disorder is sometimes accompanied by a mild C1-C2 instability or the presence of a space-occupying lesion such as ossification of posterior longitudinal ligament, pannus, or retro-odontoid pseudo-tumor, which are indications for surgery if symptomatic cord compression is present. A C1 posterior arch resection has been the procedure of choice but is associated with several fatal complications.
View Article and Find Full Text PDFResolution of retro-odontoid cyst in a patient with atlanto-occipital assimilation after occipitocervical fixation.
Surg Neurol Int
January 2021
Department of Neurosurgery, Takeda General Hospital, Fushimiku, Kyoto, Japan.
Background: Fusion of the atlas with the lower part of the occiput is clinically known as atlanto-occipital assimilation (AOA) or atlas occipitalization. This can be either partial or complete depending on the extent of fusion. AOA is one of the most common congenital anomalies of the craniovertebral junction and is usually asymptomatic.
View Article and Find Full Text PDFRetro-Odontoid Pseudotumor with Cervical Medullary Compression: A Case Report.
Spartan Med Res J
April 2018
Beaumont Hospital System, Neurological surgery, Attending physician and Chief of Neurosurgery, Trenton, MI.
A retro odontoid pseudo tumor is a mass lesion lying posterior to the odontoid process along the dura. It is a disease process seen in inflammatory and non-inflammatory conditions causing chronic atlanto-axial instability. This type of mass has the potential to enlarge causing cervicomedullary compression and symptoms of myelopathy.
View Article and Find Full Text PDFRetro-odontoid pseudo-tumor due to calcium pyrophosphate crystal deposits with spinal cord compression and histopathological confirmation.
Joint Bone Spine
July 2018
Department of Rheumatology, North Hospital, University Hospital of Saint-Etienne, avenue Albert-Raimond, 42270 Saint-Priest-en-Jarez, France; Sainbiose, Inserm U1059, University of Lyon, 42023 Saint-Etienne, France. Electronic address:
[Cervical retro-odontoid pseudo-tumor treated with posterior decompression surgery].
Rinsho Shinkeigaku
December 2013
Division of Neurology, Hyogo Prefectural Amagasaki Hospital.
A cervical retro-odontoid pseudo-tumor, which is considered as a reactive fibrocartilaginous mass, is a rare condition in cervical myelopathy. A 63-year-old male, with repeated neck axial movements by a long-term leisure-time cycling, developed subacute myelopathy. Cervical MRI showed a mass lesion at the retro-odontoid region, compressing to the upper spinal cord.
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