Purpose Retro-odontoid pseudotumor, not related to inflammatory or traumatic conditions, is
an uncommon pathology. Atlanto-axial instability has been advocated to explain the …

Retro-odontoid pseudotumor, or mass-like retro-odontoid soft tissue thickening, is an
uncommon but important imaging finding that may be associated with rheumatoid arthritis …

Retro-odontoid pseudotumor formation consists of an abnormal growth of granulation tissue
typically posterior to the odontoid process, resulting as a manifestation of atlantoaxial …

A non-neoplastic mass posterior to the dens is termed a retro-odontoid mass (R-OM). This
retrospective study evaluated radiographic and clinical outcomes and R-OM changes after …

Study Design. Case series study. Objective. The aim was to investigate the incidence of retro-
odontoid pseudotumor in patients with atlantoaxial instability (AAI) and evaluate …

The retro-odontoid pseudotumor is often concurrent with atlantoaxial subluxation (AAS).
Therefore, the pseudotumor is relatively common in rheumatoid arthritis (RA) but rare in …

Objective. Pannus formation in the atlanto-axial joint is a well-recognized complication of
rheumatoid arthritis (RA). Occasionally, atlanto-axial pannus is reported when patients …

Background: A retro-odontoid pseudotumour compressing the spinal cord and causing
myelopathy is often associated with an inflammatory condition such as rheumatoid arthritis …

OBJECTIVE Increasing soft-tissue mass posterior to the odontoid process causes spinal
cord compression. Retro-odontoid pseudotumors are considered to be associated with …

Objectives Retro-odontoid pseudotumor (ROP), with no rheumatoid arthritis, atlantoaxial
instability, or other primary diseases, is defined as idiopathic retro-odontoid pseudotumor …