PMC4566305_01
Preoperative sagittal T2-weighted cervical magnetic resonance imaging depicting bony listhesis and synovial lesion
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F1
Magnetic resonance imaging (MRI) of the cervical spine was performed which demonstrated a lesion with effects of significant erosion on the C5-C6 facet joint, listhesis with suspected instability, displacement of the spinal cord to the left, epidural extension, and foraminal enlargement [Figures 1 and 2].
Preoperative axial T2-weighted cervical magnetic resonance imaging depicting epidural synovial lesion with facet and neuroforaminal involvement
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F2
Magnetic resonance imaging (MRI) of the cervical spine was performed which demonstrated a lesion with effects of significant erosion on the C5-C6 facet joint, listhesis with suspected instability, displacement of the spinal cord to the left, epidural extension, and foraminal enlargement [Figures 1 and 2].
Microscopic analysis of tissue sample demonstrating moderately cellular chondrocytes
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F3
The chondrocytes were well-differentiated, demonstrated nuclear atypia, and were arranged in clusters-findings consistent with synovial chondromatosis [Figure 3].