Study Design. The first case of a synovial cyst of the upper cervical spine associated with os
odontoideum diagnosed by magnetic resonance imaging is presented. Objectives. To …

Calcium pyrophosphate dihydrate (CPPD) crystal deposition disease is characterized by the
accumulation of CPPD crystal in articular and periarticular tissues, but CPPD crystal …

Background: Calcium pyrophosphate dihydrate (CPPD) crystallization is known to occur in
the spine, leading to the development of visible calcification as seen by imaging …

Background: Periodontoid synovial cysts are rare lesions which may produce symptomatic
cervico-medullary compression. Method: We report such a patient, whose progressive …

Calcifying pseudoneoplasm of the spine is a rare nonneoplastic lesion of unknown origin
described in adolescents and adults. Its clinical manifestations include axial pain …

Resolution of Intraspinal Retro-odontoid Cyst Associated Wit... : Clinical Spine Surgery
Resolution of Intraspinal Retro-odontoid Cyst Associated With Os Odontoideum After Posterior …

Background Spinal calcium pyrophosphate deposition disease (CPPD) is uncommon, and
often resembles more common spine pathologies causing pain and neural compression …

Objective The authors present reports of 2 cases in which there was manifest atlantoaxial
instability and presence of retro-odontoid pseudotumor. The retro-odontoid tumor …

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 …

Study Design. A case report of os odontoideum with retro-odontoid soft tissue hypertrophy
treated by the transarticular screw fixation. Objectives. To present a case of os odontoideum …