Objective The potential significance of relationship of atlantoaxial instability with retro-
odontoid pseudotumor, pannus, and/or cyst (RPC) is analyzed. Methods We searched the …

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

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 The preservation of nuchal musculature is essential for preventing axial pain and
cervical malalignment after laminoplasty. A few studies have examined the effect of …

Study Design Retrospective case-control study. Objective This study aimed to identify the
underlying pathologies of non-rheumatic retro-odontoid pseudotumors (NRPs), which would …

Objective Although a retro-odontoid pseudotumor associated with rheumatoid arthritis is a
well-known clinical entity, little is known about retro-odontoid pseudotumors not associated …

Objective Hemodialysis has been reported to be associated with retro-odontoid
pseudotumor (ROP), but its clinical characteristics have not been well described. The …

Purely intradural retro-odontoid synovial cysts are rarely reported in neurosurgical literature,
particularly in the absence of associated bony erosions. We present the case of a 57-year …

Objective To investigate whether retro-odontoid soft-tissue thickness (ROSTT) is associated
with cervical degeneration, cervical spine mobility, and sagittal balance of cervical spine …

Objective Although the spontaneous regression of pseudotumors after posterior fusion has
been reported, the predictive factors remain unclear. We examined the radiological features …