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 …

Background Retro-odontoid pseudotumor (RP) can be caused by several diseases,
especially rheumatoid arthritis, and is usually associated with the presence of atlantoaxial …

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

Study Design: Retrospective review. Objective: The aim of this study is to assess the
radiographic characteristics of patients with a retroodontoid pseudotumor and to 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 …

Study Design. A retrospective review of 10 consecutive patients with a noninflammatory retro-
odontoid pseudotumor. Objective. To examine the radiographic characteristics in patients …

Study Design. A retrospective, consecutive case series. Objective. To analyze the
relationship between retro-odontoid soft-tissue thickness and patients' age, sex, and …

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

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