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Published in: Skeletal Radiology 1/2016

01-01-2016 | Scientific Article

Imaging features of synovial chondromatosis of the spine: a review of 28 cases

Authors: Laurel A. Littrell, Carrie Y. Inwards, Franklin H. Sim, Doris E. Wenger

Published in: Skeletal Radiology | Issue 1/2016

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Abstract

Objective

To describe the radiographic, CT, and MRI appearance of synovial chondromatosis of the spine.

Materials and methods

Radiology and pathology databases were searched for cases of spinal synovial chondromatosis from 1984 through 2013, yielding 29 patients (16 males, 13 females). The average age was 45 years. Twenty-eight patients had imaging studies available for review including seven radiographs, two myelograms, 13 CT, and 23 MRI exams.

Results

Cases were located in the cervical spine (16), thoracic spine (6), lumbar spine (6), and sacrum (1). Twenty-two cases (79 %) had an epidural component. Eighteen (64 %) had a neural foraminal component. Sixteen (57 %) had a paraspinal component. The mass abutted a facet joint in 96 % of cases. Nearly all (96 %) showed a normal facet joint without internal erosive changes. Most (79 %) showed evidence of chronic extrinsic bony erosion, usually involving the surface of the facet. Only 44 % had calcifications as a dominant finding. Most patients (88 %) had evidence of neural compression. On T1-weighted MRI, 80 % showed intermediate or a combination of intermediate and dark signal. On T2-weighted images, 89 % showed heterogeneous signal with discrete areas of dark signal. The majority (83 %) showed a peripheral pattern of enhancement, usually peripheral nodular.

Conclusions

Synovial chondromatosis should be considered in the differential diagnosis when evaluating an epidural and/or paraspinal mass near a facet joint, especially when there is evidence of chronic extrinsic bone erosion, dark signal or nodules on T1 and/or T2, and nonenhancing fluid or myxoid signal centrally with thin or nodular peripheral enhancement.
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Metadata
Title
Imaging features of synovial chondromatosis of the spine: a review of 28 cases
Authors
Laurel A. Littrell
Carrie Y. Inwards
Franklin H. Sim
Doris E. Wenger
Publication date
01-01-2016
Publisher
Springer Berlin Heidelberg
Published in
Skeletal Radiology / Issue 1/2016
Print ISSN: 0364-2348
Electronic ISSN: 1432-2161
DOI
https://doi.org/10.1007/s00256-015-2248-8

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