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

A 14-year-old Japanese boy presented with myelopathy due to atlas hypoplasia with
complete posterior arch. Decompressive laminectomy of the atlas produced good …

Study Design. A retrospective review. Objective. The purpose of this study was to evaluate
the clinical and pathologic findings and surgical treatment outcomes for atlantoaxial …

Study Design. Cadaveric study. Objective. To define congenital hypoplasia of the atlas.
Summary of Background Data. Little has been written about hypoplasia of the atlas and it is …

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 …

Narrow cervical spinal canal is an important risk factor for the development of cervical
myelopathy. Patients with this disease often present with congenital narrowness of the …

Study Design. A retrospective analysis of 13 patients with atlantoaxial instability secondary
to Os odontoideum who underwent posterior atlantoaxial fusion. Objective. To assess the …

BACKGROUND CONTEXT: In cranio-vertebral junction, retro-odontoid pseudotumor without
evidence of rheumatoid arthritis is a rare condition. PURPOSE: To discuss the mechanism of …

A retroodontoid pseudotumor is a nonneoplastic mass arising posterior to the odontoid
process. We describe a 67-year-old woman admitted to our hospital with numbness of the …

A 79-year-old Japanese female presented with symptomatic cervical myelopathy caused by
a hypoplastic posterior arch of the atlas and ossification of the transverse ligament …