Spinal extradural benign synovial or ganglion cyst

Pendleton, Bruce D.; Carl, Barton; Pollay, Michael

doi:10.1097/00006123-198309000-00021

Cited by 7 publications

(3 citation statements)

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“…They may be due extrusion of the synovial fluid from a defect in the joint capsule or they may be due to myxoid degeneration and cyst formation in collagen connective tissue. They may also form due to increased production of hyaluronic acid by fibroblasts or by nonspecific proliferation of mesenchymal cells 13–16 . The formation of degenerative intraspinal cysts could be secondary to degeneration of the articular processes, intervertebral ligaments, or intervertebral discs 1,17 .…”

Section: Discussionsupporting

confidence: 78%

Imaging Diagnosis—degenerative Intraspinal Cyst Associated With an Intervertebral Disc

Penning

Benigni

Steeves

et al. 2007

Vet Radiology Ultrasound

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A 6-year-old neutered male Rottweiler had chronic episodic signs of thoracolumbar pain and inability to stand that did not improve after rest and nonsteroidal antiinflammatory medication. In magnetic resonance images, an extradural mass was identified between the spinal cord and the T13/L1 intervertebral disc; the mass was compressing the cord in a dorsoventral direction. The lesion had a low signal intensity rim that enhanced slightly after gadolinium administration, and contents with similar signal intensity to cerebrospinal fluid. The lesion was removed surgically by severing its attachments to the annulus fibrosus. The histologic diagnosis was degenerative intraspinal cyst. The origin of such cysts, and their relationship to synovial and ganglion cysts is discussed.

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Section: Discussionsupporting

confidence: 78%

Imaging Diagnosis—degenerative Intraspinal Cyst Associated With an Intervertebral Disc

Penning

Benigni

Steeves

et al. 2007

Vet Radiology Ultrasound

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“…The pathogenesis of intraspinal synovial cysts is poorly understood, but has been linked to both degenerative and traumatic events 25,26 . Synovial cysts have been assumed to develop as sequelae to osteoarthritis of the facet joints.…”

Section: Discussionmentioning

confidence: 99%

Synovial Cysts Associated with Cauda Equina Syndrome in Two Dogs

et al. 2006

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“…[1][2][3][4][5][6] They rarely occur in the cervical spinal canal, and synovial cysts at the C1-C2 junction are extremely rare. 4,[7][8][9][10][11][12][13][14][15][16][17][18][19] The pathogenesis of the synovial cyst is unclear but is thought to be attributable to the degenerative changes of facet joints or to microtrauma.…”

mentioning

confidence: 99%

Synovial Cyst at the C1-C2 Junction in a Patient with Atlantoaxial Subluxation

Okamoto¹,

Doita²,

Yoshikawa³

et al. 2004

Journal of Spinal Disorders &Amp; Techniques

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Synovial cysts of the cervical spine causing myelopathy are rare. The pathogenesis of these cysts is often attributed to degenerative changes of the facet joints or microtrauma. The authors report a synovial cyst at the C1-C2 junction in a patient with atlantoaxial subluxation without a congenital anomaly or inflammatory conditions. A 72-year-old man presented with a progressive right-sided myelopathy attributed to a C1-C2 synovial cyst accompanied by atlantoaxial subluxation and C3-C6 spondylosis. Magnetic resonance imaging of the cervical spine showed a large cystic mass compressing the spinal cord located at the C1-C2 junction. A C1 hemilaminectomy, complete evacuation of the cyst contents, and posterior atlantoaxial fusion were performed, and a double-door laminoplasty was also done at C3-C6. The patient showed significant improvement of paresthesia and motor weakness of the right upper and lower extremities immediately after the operation. Synovial cysts should be considered in the differential diagnosis of an extradural mass of the upper cervical spine. Posterior fusion combined with direct excision of the cyst may be the optimum treatment of a synovial cyst at the C1-C2 junction in a patient with atlantoaxial subluxation.

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Spinal extradural benign synovial or ganglion cyst

Cited by 7 publications

References 0 publications

Imaging Diagnosis—degenerative Intraspinal Cyst Associated With an Intervertebral Disc

Imaging Diagnosis—degenerative Intraspinal Cyst Associated With an Intervertebral Disc

Synovial Cysts Associated with Cauda Equina Syndrome in Two Dogs

Synovial Cyst at the C1-C2 Junction in a Patient with Atlantoaxial Subluxation

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