Nonneoplastic disease
Spinal synovial cyst

Topic Completed: 1 February 2013

Minor changes: 26 September 2019

Copyright: 2002-2019,, Inc.

PubMed Search: "Spinal synovial cyst"

Related topics: Synovial cyst

Vijay Shankar, M.D.
Page views in 2019: 2,150
Page views in 2020 to date: 878
Cite this page: Shankar V. Spinal synovial cyst. website. Accessed May 24th, 2020.
Definition / general
  • Soft tissue mass located extradurally along medial border of degenerated facet joint
  • Usually at L4-5, rarely in cervical or thoracic spine
  • Filled with clear or xanthochromic fluid
  • Causes back and radicular pain
  • Rarely results in cauda equina syndrome (Pain Physician 2012;15:435)
Radiology images

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Cystic mass in L2-L3 facet joint

Case reports
Microscopic (histologic) images

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Hemorrhagic synovial cyst

Thin fibrous wall

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