BACKGROUND CONTEXT: Noninfectious nontumorous retro-odontoid masses are rare,
and masses have not been reported to extensively compress the spinal cord. We …

✓ The presence of an atlantoaxial degenerative articular cyst is rare; when present this
lesion extends posteriorly to the dens, causing cervicomedullary compressive myelopathy …

BACKGROUND: Atlantoaxial degenerative articular cysts are rare lesions that can cause
extradural compression of the cervicomedullary junction. When symptomatic, they usually …

Study Design. Case report. Objective. We report on a case with a retro-odontoid synovial
cyst, and the immediate reduction of the cyst was confirmed after lateral atlantoaxial joint …

We report the case of a patient with a retro-odontoid synovial cyst, coupled with os
odontoideum and atlantoaxial instability. We observed the regression of the cyst after C1-2 …

Background Degenerative cystic lesions of atlantoaxial joints are rare and generally
believed to be due to mechanical instability. There is currently no consensus on the …

Retroodontoid pseudotumor (ROP) is a nonneoplasic lesion of unknown etiology, commonly
associated with inflammatory conditions, and the term of pannus is usually used. Less …

Purpose Retro-odontoid synovial cysts are rare and attributable to degenerative changes in
the atlantoaxial joints. An anterolateral approach facilitates access to lesions located …

✓ Cysts associated with spinal joints are not a common cause of neurological symptoms.
The authors report a series of five patients with cysts of the atlantodental articulation and …

Among 27 cases of marked atlanto-axial instability investigated in the last 10 years we found
three with reducible dislocation, in which a cystic “ghost” pseudotumours appeared behind …