J Korean Neurosurg Soc.  2006 Mar;39(3):221-223.

Retro-odontoid Synovial Cyst with Os Odontoideum and Atlantoaxial Instability

• Kim SW
• Chang CH
• Kim SH

Abstract

We report the case of a patient with a retro-odontoid synovial cyst, coupled with os odontoideum and atlantoaxial instability. We observed the regression of the cyst after C1-2 transarticular screw fixation and posterior wiring without direct surgical excision of the cyst on the follow-up MR images, which were obtained two and three months postoperatively. The myelopathic symptoms and signs of this patient were resolved by degrees.

Keyword

Synovial cyst; Os odontoideum; Atlantoaxial instability; C1-2 fixation; Spontaneous reduction

MeSH Terms

Follow-Up Studies
Humans
Synovial Cyst*